Solve the simultaneous equations: (a) y - 2x = 6; (b) y+2x = 0.
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rearrange equation (a) to be: y = 6 + 2x. Substitute this into equation (b) to get: (6 + 2x) + 2x = 0
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rearrange this to get: 6 + 4x = 0. Simplify to get x = -(6/4). Get the value for x to be: x = -1.5.
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substitute this x value into equation (b) to get the value for y, hence we get: y + 2(-1.5) = 0; y = 3.
FM
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