exam Maths Puzzle Numerical Ability

the question says use the diagram to solve for x

the equation is 42=3x+y and y=x+2

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exam Other Question

Use the quadratic formula to solve the following equations. Show all major steps involved and leave solutions in radical form (when applicable).
a: 4x^2 + 5x = 6 16x2 - 16x + 4 > 0 Solve each rational inequality. State and graph the solution set.