If x + y = 26 and x - y = 18, then y = ? A.) 4 B.) 8 C.) 9 D.) 22 E.) 44 x + y = 26 x - y = 18 --------------- 2x = 44 {added the two equations together, eliminating the y} x = 22 {divided each side by 2} x + y = 26 {top original equation} 22 + y = 26 {substituted 22, in for x, into top original equation} y = 4 {subtracted 22 from each side} A.) 4- Algebra House
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