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Adding two equations is an easy step. First choose a variable you want to eliminate. Multiply each one by the number that would get you the opposite or additive inverse so it will be gone from the modified equation.

x+y=5 =>3x+3x=15

2x-3x=-5 =>2x-3x =-5

5x =10

x = 2

Substitute that number into one of the equations and solve for the other.

2+y=5

y=3

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