4x △ 4 / 21 = 1 / 12 / 3 × (36-x) = 8 x △ 3 = 3 / 4 / 25 / 23x = 138

4x △ 4 / 21 = 1 / 12 / 3 × (36-x) = 8 x △ 3 = 3 / 4 / 25 / 23x = 138

1. 4x △ 4 / 21 = 12, 4x = 12 × 4 / 21, x = 12 / 21 = 4 / 7
2. 1 / 3 × (36-x) = 8 36-x = 24 x = 12
3. X △ 3 = 3 / 4 x = 3 / 4 × 3 = 9 / 4
4. 23x of 25 = 138 x = 138 × 25 of 23 = 6 × 25 = 150

Solution equation: 1.4x-6 × 1 / 5 = 4 / 5 2.4 × 5-3 / 4x = 93.3 / 4x × 15 / 14 = 5 / 21 4.5 / 6x △ 1 / 6 = 15

(1)4x=4/5+6/5=2 x=1/2
(2)-3/4x=9-12=-3 x=4
(3)3/4x=5/21*14/15 x=8/27
(4)5/6x*6=15 x=3

0.6 (8-4x) + 3 = 3.6 to solve the equation

0.6(8-4x)+3=3.6
4.8-2.4x=3.6-3
4.8-2.4x=0.6
2.4x=4.8-0.6
2.4x=4.2
x=1.75

80 / (x / 2-80) = (x / 2 + 60) / (X-60) solve the equation in 3 minutes and 100 minutes

80/(x/2-80)=(x/2+60)/(x-60)
80(x-60)=(x/2-80)(x/2+60)
80x-4800=x^2/4+30x-40x-4800
x^2-360x=0
x(x-360)=0
X = 0 or x = 360
It is proved that x = 0 or x = 360 are solutions of the equation

It is known that the equation 4x & sup2; + 4 (A & sup2; + B & sup2; + C & sup2;) x + 3 (A & sup2; B & sup2; + B & sup2; C & sup2; + C & sup2; a & sup2;) = 0 has two equal real roots. Try to judge the shape of △ ABC with a, B and C as three sides

^What do you mean? Your answers are very good. Thank you very much

Solve the equation (1) 2 (X & sup2; + 1 / X & sup2;) - 3 (x + 1 / x) = 1; 2) x & sup2; + 3 / x-4x / X & sup2; + 3 = 3

(1) 2 (X & sup2; + 1 / X & sup2;) - 3 (x + 1 / x) = 1,2 [(x + 1 / x) & sup2; - 2] - 3 (x + 1 / x) - 1 = 0,2 (x + 1 / x) & sup2; - 3 (x + 1 / x) - 5 = 0, [2 (x + 1 / x) - 5] * [(x + 1 / x) + 1] = 0,2 (x + 1 / x) - 5 = 0, or x + 1 / x + 1 = 0,2x + 2 / X-5 = 0, or x + 1 / x + 1 = 0,2x ^ 2-5x + 2 = 0, or x ^ 2 + X + 1 = 0, (...)

How to solve equation 50-5 + 4x = 61

50-5+4x=61
45+4x=61
4x=16
x=4

How to solve the equation of 50-5 4x

Is that an equation, big brother

How to solve the equation of 50-4x = 24.4

4x=50-24.4
4x=25.6
x=6.4

1.4x-2x = 702.4x-2 (x + 2) = 203. (x / 4) - (x + 2 / 5) = 3 / 4 who can use these three equations to solve a problem,

Four times of a number minus two times of the number equals 70, to find the unknown
4x-2x=70
2x=70
x=70÷2
x=35
A's speed is X. one's speed is 2 times faster than a's. A walks for four hours, 20 more than B walks for two hours
4x-2(x+2)=20
4x-2x-4=20
2x-4=20
2x=24
x=12
A quarter of a number is three fourths more than two fifths of the number
（x/4）-（x+2/5）=3/4
X = 23 out of 15
 
 
I don't know if the answer is right