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Does either of the equations have an isolated variable in it?
(5,2)
When solving a system of equations using substitution, there are three steps.
(I): LHS-3y=RHS-3y
(I): Rearrange equation
(II):x= y+3
(II):Distribute 2
(II):Add terms
(II):LHS-6=RHS-6
(II): .LHS /6.=.RHS /6.
(I):y= 2
(I):Add terms
(I), (II): x= 5, y= 2
(I), (II): Multiply
(I), (II): Add terms