Question 1038552
x+y =118
x-3y = 18 multiply all by -1 and add to the other equation:
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x+y = 118
+
-x+3y = -18
4y = 100
y = 25
Now let's find x:
x-3y = 18
x-3(25) = 18
x-75 = 18
x = 93
Check
x+y = 118
93+25 = 118 Correct.
John