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How do you solve 3X plus 2Y equals 16 and 5X plus 3Y-18 equals 4Y by substitution?
Wiki User
∙ 14y ago
First collect like terms in the second equation: 5x - 18 = 4y - 3y ie y = 5x - 18
Substitute this for the term in y in the first equation, getting 3x + 2(5x - 18) = 16
ie 3x + 10x - 36 = 16
ie 13x = 16 + 36
so x = 4 and y = 5 x 4 - 18 ie 2.
Wiki User
∙ 14y ago
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