Question

Não consigo resolver as equações

a) 2X+2-X=4
b) 4+2(X-3)=0
c) 4(5X-2)=12
d)3X+7-X=-2X+8

Answer 1

a) 2x+2-x=4
2x-x=4-2
x=6
b) 4+2.(x-3)=0
4+2x-6=0
2x=6-4
2x=2
x=2/2
x=1
c) 4.(5x-2)=12
20x-8=12
20x=12+8
20x=20
x=20/20
x=1
d) 3x+7-x=-2x+8
3x-x+2x=8-7
3x+x=15
4x=15
x=15/4