Question

M
Sabendo que: A= 6x + 2y B= 5x - y C= 2x + 1; calcule A + B + C*
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Answer 1

2×+1=0

2×=-1

×=-1/2

5×-y=0

5*(-1/2)-y=0

-5/2-y=0

-y=5/2(-1)

y=-5/2

6×+2y+5×-y+2×+1

6(-1/2)+2(-5/2)+5(-1/2)-(-5/2)+2(-1/2)+1

-6/2-10/2-5/2+5/2-2/2+1

-3-5-5/2+5/2-1+1

-8+0+0=-8