Barbara H. answered • 01/22/15
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3(4Y) - Y = 70 12Y - Y = 70 11Y = 70 Y = 70/11 = 6 4/11
Iyana M.
asked • 01/22/154y=x 3x-y=70
How do I solve this using substitution
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Using substitution means solving for one variable and using that answer to solve for the other variable. In your case it
's solved for you because it says that 4y = x so when you see x in the other equation, replace it with 4y...
3(4y) - y = 70 12y - y = 70 11y = 70, and then go from there...
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