Solve: 4x + 5 = 6x - 13

4x+5=6x-13. Take 4x from both sides 5= 6x-4x-13 5=2x-13. On the right hand side, you have -13 value. Add 13, to make 0. Adding thirteen on right also adds thirteen on left. 5 + 13 = 2x - 13 + 13 18=2x. 2 times 'x' is 18. You might automatically know that 2 times 9 is 18, but it is good practice to use algebra here, as you will not always get a full number and may end up with fractions. If you divide by 2 on both sides, you get 2x/2 = 18/2 x=9. Always show your working, so the examiner knows what you are trying to do and can give you marks for at least showing your algebra skills.

YH
Answered by Yacine H. Maths tutor

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