exam Maths Puzzle Numerical Ability

Solve the problem using the substitution method. 3a-b/4=a+1 and 5a+b/2=a

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exam Other Question

4z to the power of 3 - 18z to the power of 2 - 10z

2p - 6q + pq - 3q to the power of 2 7-2n=n-14 Can you help me finging the solution The type of question is equation with variables on both sides. my answer was -21 I am not sure if i am right.