Question

Me ajudem pf, tenho que entregar amanhã :(

C) 7 (x-1) -2 ( x-5) = x-5

D) 3,5 x+8 =2 (x+7)

F) 1x + 1x + 1x + 10= 5x +2

g )8x+ 44= 10x -20

Answer 1

C) 7×x-1=7x-7

7x-7-2(x-5)=x-5

7x-7-2x+10=x-5

5x+3=x-5

4x=-8

x=-8÷4

x=-2

D)3,5x+8=2x+14

1,5x=14-8

1,5x=6

x=6÷1,5

x=4

F)3x+10=5x+2

-2x=2-10

-2x=-8

×(-1) x=-8÷2 ×(-1)

x=-4

G)8x+44=10x-20

8x-10x=-20-44

(×-1)-2x=-64(×-1)

X=64÷2

X=32