Question 1036531

How to solve 3x+2y=14 and y=X+2
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Note that x IS NOT the same as X. Anyway, I'll treat them as if they were.
3x + 2y = 14 -------- eq (i)
y = x + 2 ------- eq (ii)
Equation 2 has already been solved for y, so all one has to do is SUBSTITUTE this value in eq (i)
3x + 2(x + 2) = 14 ------- Substituting x + 2 for y in eq (i)
3x + 2x + 4 = 14
5x = 14 - 4
5x = 10
{{{highlight_green(matrix(1,3, x = 10/5, or, x = 2))}}}

{{{highlight_green(matrix(1,3, y = 2 + 2, or, y = 4))}}} -------- Substituting 2 for x in eq (ii)