Solve for x: 4 x + 1 = 2 x + 12
The best way to answer these kind of questions is by moving all the unknowns to one side. In this case, the only unknown is x, so we should start by moving all the x's to one side. Since there are 4x's on the left hand side but only 2 on the right hand side, we can eliminate 2 x's. This leaves: 2x + 1 = 12.
The next step is to subtract 1 from each side so we are left with just x's on one side and just numbers on the other. This leaves: 2x = 11. And finally we divide by 2 to leave a single x, so x = 5.5
TK
Related Maths GCSE answers
All answers ▸Before an exam, I always go through as many past papers as possible but I still don't know how to do the questions on an exam when they come up, why and what can I do?
From June 2015 Edexcel paper: Solve 7x + 8 = 2x – 3
The longest side in a right-angled triangle is 12cm. One of the shorter sides is 4 cm. Calculate the perimeter of the triangle
Prove that the sqrt(2) is irrational