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2x+5y =39
2.4y+5y=39
8y+5y=39
13y=39
y=39:3
y=3
x=4y
x=4.3
x=12
b.y=3x
x+4y=26
x+4.3x=26
x+12x=26
13x=26
x=26:13
x=2
y=3x
y=3.2
y=6