3x - 4y = 10

y = x - 3

3x - 4(x - 3) = 10 {substituted x - 3, in for y, into top equation}

3x - 4x + 12 = 10 {used distributive property}

-x + 12 = 10 {combined like terms}

-x = -2 {subtracted 12 from both sides}

x = 2 {divided both sides by -1}

y = x - 3 {bottom equation}

y = 2 - 3 {substituted 2, in for x, into bottom equation}

y = -1 {subtracted}

**x = 2**and

**y = -1**

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