exam Maths Puzzle Numerical Ability

y = 4/2 +1 = ?

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exam Other Question

x=y+6
y=-2-x

My daughter is trying to solve this equation by substitution. I am useless in attempting to help her. We would greatly appreciate you explaining the answer.
10) Two angles are complementary if their sum is 90e. If the measure of the first angle is xe, and the measure of the second angle is (3x - 2)e, find the measure of each angle.
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