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4x + 9y = $190
5x +6y = $185
Solve for x.
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First take off the sign "$".
4x + 9y = 190 (1)
5x + 6y = 185 (2)
Multiply equation (1) by 5 (both sides) and the equation (2) by (-4), then add. In this way you eliminate x and will get a single equation for y:
45y + (-4)*6y = 5*190 - 4*185, or
45y - 24y = 210, or
21y = 210.
Can you complete the solution from this point?
