Question 137178
JUST A COMMENT ON NOT KNOWING IF YOU HAVE THE CORRECT ANSWER.
ASSUMING (?) YOU HAVE THE CORRECT FORMULA, WHICH IS THE DIFFICULT PART WHEN SOLVING WORK PROBLEMS, THEN  DOING THE PROOF BY REPLACING THE UNKNOWN(S) WITH THE ANSWER WILL HELP A LOT.
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x+y=13 multiply this equation by -22 & add.
22x+36y=356
-22x-22y=-286
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0+14y=70
y=70/14
y=5 answer.
x+5=13
x=13-5
x=8 answer.
proof:
22*8+36*5=356
176+180=356
356=356