solve x/2 + 11 = 15
whenever we solve an equation we want to get the unknown (x) alone on one side of the equals sign, but remember whatever we do to one sign of the equation, we have to do to the other. So lets start by subtracting 11 from both sides:
x/2 + 11 = 15
x/2 = 15 - 11
this then works out to
x/2 = 4
from here we can multiply both sides of the equation by 2:
x = 4 x 2
therefore x = 8
SP
Related Maths GCSE answers
All answers ▸How do I use Pythagoras' Theorem to calculate the hypotenuse of a triangle?
Solve the following simultaneous equations: 3a + 2b = 36 equation ( 1), and 5a + 4b = 64 equation (2)
GCSE: How do you find the bearing of point B from A?
How do you translate the graph y = x^2, five unit squares negatively horizontally and 3 unit squares positively vertically?