To solve the equations: X / 2 + Y / 3 = 1, X * 20% + y * 30% = 14 * 10%

To solve the equations: X / 2 + Y / 3 = 1, X * 20% + y * 30% = 14 * 10%

x/2+y/3=1 (1)
x*20%+y*30%=14*10%(2)
(1) Multiply both sides by six
3x＋2y=6(3)
(2) Multiply both sides by 10
2x＋3y=14(4)
(4) (3) × 2
5y=30
y=6
hold
Y = 6 generations (3)
3x＋2×6=6
3x=﹣6
x=﹣2
So the solution of the equations is x = - 2, y = 6

The speed of car is 60 km / h, the time of travel is 90 km / h, the distance of ship is 800 km / h, the time of travel is 20 km / h

1. Known "vehicle speed 60 km / h, time x h, distance 90 km"
Column equation, 60 * x = 90
The solution is x = 1.5
A: the car ran for 1.5 hours
2. It is known that "the ship is x kilometers per hour, 20 hour journey, 800 kilometers"
Column equation, 20 * x = 800
The solution is x = 40
A: the ship travels 40 kilometers per hour

How to solve the equation 2x + 4 (X-12) = 60

2x+4(x-12)=60
2x+4x-48=60
2x+4x=48+60
6x=108
x=108÷6
x=18

It's urgent to solve the equation. X × 50 + 50 = x × 30 + 20
X＝?

It's very simple. X × 50 = x × 30 20
Xx50-Xx30=20-50
20X=-30
X=-3/2

How to solve the equation 20 (10-x) + 10x = 120

20(10-x)+10x=120
200-20x+10x=120
-10x=-80
x=8

How to solve the equation x + 20% = 120
X-20% = 120?
20%x
Not 20%
- -

x-20%x=120
x-0.2x=120
0.8x=120
x=120÷0.8
x=150

How to solve the equation (x-1) / 10 + (x-3) / 15 + X / 20 = 1?

Multiply both sides by 60 at the same time, that is 6x-6 + 4x-12 + 3x = 60, x = 6

X÷5=1+(20+20-X)÷15
X÷5=1+(20+20-X)÷15

X÷5=1+(20+20-X)÷15
Multiply both sides of the equal sign by 15
3x=15+40-x
3x+x=45
4x=55
x=55÷4
X=13.75

The solution of the equation x minus 15 = 20 is

　　X－15=20
X = 20 + 15-15 move to the right and the negative becomes positive
X=35

How to solve the equation of 20 * 0.1 * x = 15 * 2

Multiply left = multiply right
2x=30
x=30/2
x=15