Question

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Resolva as equações.

(A)
4×+4=2×-2

(B)
2×-3=10×+2

(C)
3+× 2×-3
--- = ----
3 5

(D)
30×-15=10×-5

(E)
5(2×+2)3(2-×)=10

Answer 1

A) 4x + 4= 2x - 2
4x - 2x = - 2 - 4
2x = - 6
x = - 6/2
x = - 3

B) 2x - 3 = 10x + 2
2x - 10x = 2 + 3
-8x = 5 (-1)
8x = - 5
x = - 5 / 8

D) 30x - 15 = 10x - 5
30x - 10x = - 5 + 15
30x = 10
x = 10/30 (÷10)
x = 1/3

C) 5(2x + 2)3(2- x) = 10
10x + 10 + 6 - 3x = 10
7x = 10 - 10 + 6
7x = 6
x = 6/7