Mathematics
Jonathon
18

Solve this question using the substitution method. 1) Y=1-2x -4x+3y=-17 what is x? what is y? 2) x+3y=9 2x+3y=15 please provide the work.

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(1) Answers
abbottpaige

Y=1-2x -4x+3y=-17 Plug in y into -4x+3y=-17 -4x+3 (1-2x)=-17 -4x+3-6x=-17 -10x+3=-17 -3 both sides -10x=-20 ÷-10 both sides x=2 plug in x to find y y=1-2 (2) y=1-4 y=-3 x+3y=9 2x+3y=15 make first equation into x= form -3y both sides x=-3y+9 2x+3y=15 plug in x into 2x+3y=15 2 (-3y+9)+3y=15 -6y+18+3y=15 -3y+18=15 -18 both sides -3y=-3 ÷-3 both sides y=1 plug in y x+3 (1)=9 x+3=9 -3 both sides x=6

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