Question

Resolva:

a) 2(x-3) + 4(x+1) = 3.x + 6 / x= 8/3
b) 3x/2 + 4(x-2)/4 = x/4 / x= 8/9​

Answer 1

a) 2×(x-3)+4×(x+1) = 3×x+6

2×(8/3-3)+4×(8/3+1) = 3×8/3+6

2×(8/3-9/3)+4×(8/3+3/3) = (3×8)/(1×3)+6

2×(8-9)/3+4×(8+3)/3 = 24/3+6

2×(-1/3)+4×11/3 = 24/3+18/3

(2×(-1))/(1×3)+(4×11)/(1×3) = (24+18)/3

-2/3+44/3 = 42/3

(-2+44)/3 = 42/3

42/3 = 42/3

14 = 14