What two numbers have a sum of 217 and a difference of 85?
x = one number
y = other number x + y = 217 {sum is 217} x  y = 85 {difference is 85} ————— 2x = 302 {added the two equations} x = 151 {divided each side by 2} x + y = 217 {first equation} 151 + y = 217 {substituted 151, in for x, into first equation} y = 66 {subtracted 151 from each side} 151 and 66 are the two numbers Ask Algebra House
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