Question

Me ajudem com o calculo pf

Answer 1

-6C = -12
C = -12 / -6
C = 2

2A + 5C = 6
2A + 5*2 = 6
2A +10 = 6
2A = 6-10
2A = -4
A = -4 / 2 = -2

4A - 5B + 3C = -7
4*(-2) - 5B + 3*2 = -7
-8 - 5B + 6 = -7
-5B - 2 = -7
-5B = -7 + 2
-5B = -5
B = -5/-5
B = 1