Question

3X-10+13=-2X+28 , 20X-30=40+30-20 , -5X+45-89=-90+41 , 10X-20=40+50, 3-2(X+3)=X-18 ,

Answer 1

3X-10+13= -2X+28
3X+3= -2X+28
3X+2X= 28 - 3
X = 25
 
20X-30=40+30-20
20X-30=50
20X=50-30
X= 20 - 20
X= 0

-5X+45-89=-90+41
-5X-44= -49
-5X = - 49 + 44
X= -5/5
X= 1

10X-20=40+50
10X=90+20
10X=110
X=110/10
X= 11

3-2(X+3)=X-18 
3 - 2X - 6 = X-18
-2X - 3 = X-18
-2X - X = -18 + 3
- 3X = -21 (-1)
X= 21/3
X= 7

Espero ter ajudado.