Question

7x-2=6x+5?

30-20+2x=-10?

3x+10+13=-2x+28?

20x-30=40+30x-20?

Answer 1

A)7x -2= 6x +5
7x -6x= 5 +2
x= 7

B)30-20+2x=-10
2x= -10 -30 +20
2x= -40 +20
2x= -20
x= $\frac{-20}{2}$
x= -10

C)3x+10+13=-2x+28
3x +2x= 28 -10 -13
5x= 18 -13
5x= 5
x= $\frac{5}{5}$
x=1

D)20x-30=40+30x-20
20x -30x = 40 -20 +30
-10x= 20 +30
-10x= 50
x= $\frac{50}{-10}$
x= -5

Espero ter ajudado!

Answer 2

$1) \\ 7x-2=6x+5 \\ 7x - 6x = 5 + 2 \\ x = 7 \\ \\ \\ 2) \\ 30-20+2x=-10 \\ \\ 2x = -10 -30 + 20 \\ \\ 2x = -20 \\ \\ x = \frac{-20}{2} \\ \\ x = -10 \\ \\ \\ 3) \\ 3x+10+13=-2x+28 \\ \\ 3x + 2x = 28 - 10 - 13 \\ \\ 5x = 28 - 23 \\ \\ 5x = 5 \\ \\ x = \frac{5}{5} \\ \\ x = 1 \\ \\ \\ 4) \\ 20x-30=40+30x-20 \\ \\ 20x - 30x = 40 - 20 +30 \\ \\ -10x = 20 + 30 \\ \\ -10x = 50 * (-1) \\ \\ 10x = -50 \\ \\ x = \frac{-50}{10} \\ \\ x = -5$