Question

Resolva em R as equações
A.12x+5=2x+3
B.5(3-x)+2(x-1)=-x+5
C.5x+20(1-x)=5

Answer 1

Resposta:

(A)12x+5=2x+3

12×-2x=3-5

R= 10x=-2×

(B)5(3-x)+2(×-1)=-×+5

15-5×+2x-2=-5x

15+2x-2=0

13+2×=0

R= 2x=-13

(C)5x+20(1-x)-5

5(x+4(1-×)-1)

5(x+4-4x-1)

5(-3x+3)

5(-3(x-1))

-5 x 3(x-1)

R= -15(x-1)