Question

b)7x+12-5x=15 c)15x-13+11x=-26 d) 4x+7=12x-11 (e)x+5.(2x-4)=2 (f) 5(x-1)-19=3(x-2)

Answer 1

Olá

Vamos lá

B)7x+12-5x=15
7x-5x=15-12
2x=3
x=3/2


c)15x-13+11x=-26
15x+11x=-26+13
26x=-13
x=-13/26
x=-1/2



d) 4x+7=12x-11
12x-4x=7+11
8x=18
x=18/8
x=9/4


e)x+5.(2x-4)=2
x+10x-20=2
x+10x=2+20
11x=22
x=22/11
x=2



f) 5(x-1)-19=3(x-2)
5x-5-19=3x-6
5x-3x=-6+5+19
2x=18
x=18/2
x=9

Bons estudos, dúvidas só chamar !!! erico munayer