Mathematics for IGCSE & O level - The Four Operations (Section 9 - No. 5)
What is the first step to solve the equation: 2x + 3 = 7?
Subtract 3 from both sides.
Add 3 to both sides.
Divide both sides by 2.
Multiply both sides by 2.
解释
Isolate the variable by subtracting 3 first.