Question

Se 3 (2x-1)= -2(x+y) e 4y-10=2 , determine o valor de x no conjunto universo Q

Answer 1

3 (2x - 1) = - 2 (x + y) --- 6x - 3 = - 2x - 2y ---- 6x + 2x + 2y = 3 ---- 8x + 2y = 3


4y - 10 = 2 --- 4y = 2 + 10 ------ 4y = 12 ----- y = 12/4 ------ y = 3


8x + 2y = 3 ------ 8x + 2 . 3 = 3 ----- 8x + 6 = 3 ----- 8x = 3 - 6 ---- 8x = - 3


x = - 3/8

S = { -3/8; 3}