3x+5y=54 6x+4y=72

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1 Answer

3x+5y=54 6x+4y=72
5y=54-3x
y=(54-3x)/5

6x+4y=72
4y=72-6x
y=(72-6x)/4

(54-3x)/5=(72-6x)/4
4(54-3x)/5=(72-6x)
4(54-3x)=5(72-6x)
4(54-3x)=(360-30x)
(216-12x)=360-30x
216=360-18x
216-360=-18x
-144=-18x
x=8

3x+5y=54
3(8)+5y=54
24+5y=54
5y=30
y=6
by Level 5 User (14.8k points)

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