Answer:
value of z = 2
Step-by-step explanation:
here's the solution :-
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Maybe try to add the 90s or multiply i depends
<span>5y-6+6=-20+6
5y=-14
5y/5=-14/5
y=-14/5
-14/5=-2.8</span>
Answer:
C
Step-by-step explanation:
6x - y = 31 so y = 6x - 31
substitute y = 6x - 31 into 3x + 7y = 8
3x + 7y = 8
3x + 7(6x - 31) = 8
3x + 42x -217 = 8
45x = 225
x = 5
y = 6x - 31
y = 6(5) - 31
y = 30 - 31
y = -1
answer
x = 5 and y = -1