Mathematics
KeishaHemry172
27

Solve the system by using substitution. -2x+5y=19 3x-4=y

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(1) Answers
Hanington955

3x - 4 = y......so we sub in 3x - 4 for y in the other equation -2x + 5y = 19 -2x + 5(3x - 4) = 19...distribute through the parenthesis -2x + 15x - 20 = 19....add 20 to both sides -2x + 15x = 19 + 20...combine like terms 13x = 39...divide both sides by 13 x = 39/13 x = 3 3x - 4 = y 3(3) - 4 = y 9 - 4 = y 5 = y solution is (3,5)

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