book Maths Puzzle Numerical Ability

Hi can you help me solve this please?

5(x+3)=7x+5

hope you can help

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book Other Question

My question is - The base of a triangle is 8 more than twice its height. If the area of the triangle is 42 square cetimeters, find its base and height. Round to the nearest tenth o Solve the system of equations by the addition method..All I have.

x-4y=-18
-6x+4y=-36