Solve the simultaneous equation. 2x + y = 7 and 3x - y = 8
There are few ways to carry out the following question. Elimination and substitution are the two main methods. To carry out elimination you will need to focus on the similar terms, in the question this would be y. As the signs of y are different in either equation you will add the terms. You should have a result of 5x=15. This can then be solved as x=3. Y can then be solved by substituting the value back into the equation to get y=1. The second way to carry out this method is through substitution. Rearrange one of the equations to make y the subject. for example y=7-2x. Then substitute this value for y into the other equation. You should get 3x-7+2x=8. solve this so that x=3. Then substitute this value back into the equation to get y=1.
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