Solve by substitution method : 2x - y = 2 and x + 3y = 15

By substitution,2x - y=2 -[1]
x+3y=15-[2]
x=15-3y-[3]
putting [3] in [1]
2[15-3y]-y=2
30-6y-y=2
30-7y=2
-7y=-28
y=4
hence,x=3 ans.

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