Solve simultaneously 2x-y=2, 3x+2y=17 to calculate values of x and y.

This problem can be solved through substitution. The first equation provided in the question should be rearranged to give y=2x-2. This equation for y can be directly substituted into the second equation. This would give, 3x+2(2x-2)=17 therefore eliminating the y term. By expanding this equation, we get 3x+4x-4=17 which simplifies further down to 7x=21. This gives a value of x=3. In order to calculate y, we can sub this value of x into any of the equations provided in the question. For example, substituting into the first equation gives 6-y=2. As a result, rearranging this gives a value of y=4.

WR

Related Maths GCSE answers

All answers ▸

Solve 5(x + 3) < 60


The exchange rate between dollars and euros(€) is €1 = $1.158 . (a) Felicity changes €4900 into dollars. Work out how many dollars she receives.


Solve these simultaneous equations: 3y + x = 18 and x - 4y = -10.


How do you find the gradient of a linear line just by looking at the graph?