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07-09-2016
Mathematics

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complete steps. two numbers differ by 57. their sum is 185. find the numbers. choices for the smaller number: 54, 64, 74

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jlomonte jlomonte

10-09-2016

x-y=57
x+y=185
x=185-y
substitute into first equation
(185-y)-y=57
185-2y=57
-2y=57-185
-2y=-128
y=64 substitute into first equation to find x
x-64=57
x=57+64
x=121

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