Mathematics for IGCSE & O level - Equations (Section 8 - No. 9)
What do you do to solve a simple linear equation like x + 5 = 10?
Add 5 to both sides
Subtract 5 from both sides
Multiply both sides by 5
Divide both sides by 5
解释
To isolate the variable 'x', you perform the inverse operation of adding 5, which is subtracting 5 from both sides.