Question

$(10y = 10x + 30 \\(x + 2y = 3$
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Answer 1

(10y-10x=30

(2y+x=3 ×(-5)

(10y-10x=30

(-10y-5x=-15

-15x=15

x=15/-15=-1

2y+x=3

2y+(-1)=3

2y-1=3

2y=3+1

2y=4

y=4/2=2