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Solving by Substitution Step 1: Isolate one variable. In this case the variable “y” is already isolated. Step 1: Isolate one variable. Step 2: Substitute for the isolated variable. Step 3: Solve. Step 2: Substitute for the isolated variable. In this case, we will replace the “y” of the bottom equation with the top equation. Step 3: Solve. In this case, we will solve for x. −28−4x =2 + x +4x+4x −28=2+5x −2−2 −30=5x 5 5 Now we solve for “y” by substituting in x into any given equation. x = −6 𝑦=2+x 𝑦=2+−6 𝑦=−4

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