Solve the System of Equations by Substitution. Show ALL work x+y=18 y=2x-3

Paul Hunnisett asked Sep 24, 2022

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21 votes

Solve the System of Equations by Substitution. Show ALL work

x+y=18
y=2x-3

Paul Hunnisett asked Sep 24, 2022

3.5k points

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14 votes

x + y = 18 ——— (1)
y = 2x - 3 ——— (2)

sub (2) into (1)

x + (2x - 3) = 18
3x - 3 = 18
3x = 21
x = 7

Hope this helps!

x

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