How do I solve an equation where there are unknowns on both sides of the equation?
Golden rule: Do the Same thing to both sides of the equation Approach in 4 steps 1) Multiply out any brackets 2) Gather the like terms (Use analogy of apples and oranges) 3) Get all unknown terms to one side of the equation and all numbers to the other 4) Solve ( 5) Substitute a value back into unknown to CHECK ) Example 4(x+2) = 2x + 7 1) Expand ---> 4x + 8 = 2x + 7 2) Like terms already together 3) Get unknown terms to same side (using river analogy) --> 4x-2x = 7-8 4) 2x = -1 therefore x = -1/2 5) CHECK answer by putting -0.5 into original equation
CB
Related Maths GCSE answers
All answers ▸2476 adults watch a cricket match. The ratio men : women is 3 : 1 How many more men than women watch the match?
Matt has 3 piles of coins, A , B and C. Altogether there was 72p. Pile B had twice as much as pile A. Pile C had three times as much as pile B. How much money was in Pile C?
2476 people are at a football match. The ratio of men to women is 3 : 1. How many more men than women are at the match?
Remove the brackets: −{−2[x−3(y−4)]−5(z+6)}