In 450 grams of salt water with 10% salt content, adding 50 grams of water, the salt content of new salt water is 15%______ ．

In 450 grams of salt water with 10% salt content, adding 50 grams of water, the salt content of new salt water is 15%______ ．

450 × 10% = 45 (g); 45 △ (450 + 50) × 100%, = 45 △ 500 × 100%, = 9%; 9% ≠ 15%; so the answer is: wrong

6 × 3 × x = 12 * 12 * 12 to solve the equation

6×3×x=12*12*12=》x=12*12*12/3/6=2*4*12=96

Solution equation: X / 3 - (X-6) / 12 = 2 - (2 / 3) x
fast

x/3-(x-6)/12=2-(2/3)x
x/3+(2/3)x-(x-6)/12=2
x-(x-6)/12=2
Multiply both sides by 12
12x-x+6=24
11x=18
x=18/11

Solving equation (50% + 10%) x = 5400

(50%+10%)x=5400
60% * X =5400
0.6*X =5400
X =5400/0.6=9000

Solution equation: detailed point 6x + 4 (10-x) = 50

6x+4(10-x）=50
6x+40-4x=50
6x-4x=50-40
2x=10
x=5

35-x + 2x = 55 to solve the equation

Move the left 35 term of the equation to the right to get - x + 2x = 55-35
x=55-35
x=20

2X + (35-x) * 4 = 94 to solve the equation

2x+(35-x)*4=94
2x+140-4x=94
-2x+140=94
2x=140-94
2x=46
x=23

To solve the equation: 24 △ 300 + x = 15 △ 120 + X, there must be a process

24÷（300+X）=15÷（120+X）
24*1/（300+X）=15*1/(120+X)
24*(120+X)=15*(300+X)
24*120+24X=15*300+15X
2880+24X=4500+15X
24X-15X=4500-2880
9X=1620
X=180

X + 300 × 120% = 440 to solve the equation

x＋300×120％＝440
x＋360＝440
x=80

Who can solve 120 + x = 300 + 50% x

120+x=300+50%x
x-50%x=300-120
50%x=180
x=360