exam Maths Puzzle Numerical Ability

Solve by substitution

3x-2y=2
x=2/9y

Thank you for your help.

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exam Other Question

if two angles are supplementary and one angle is 3 less than five times the oter angle, find the measure of the two angles.
write an equation and solve it to find the angles.

H lines a and b are perpendicular. the slope of line a is given. What is the slope of line b?

a is -2