exam Maths Puzzle Numerical Ability

Hello I am being asked a question that I do not understand, It asks to Solve a system of equations to find the two numbers described.
The sum of two numbers is 17 and their difference is 29

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exam Other Question

Hi! I need some help to solve for x.

4(x+5)-8x= -2(x-2

and

5-x=3(2-x)+2x

Thanks in advance for your help!
Find the slope and the y-intercept.
y = 4x - 3

Please help