exam Maths Puzzle Numerical Ability

graph(x_3)/4+(y+1)^2/4=1

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exam Other Question

Solve the equation. Be sure to check your solution.
sqrt 2y+7 +4=4
sqrt 4x+1 +3=0

Thanks Ver confused with this one Solve sytem of linear equation express in ordered pai (x,y) if possible use substitution or addition method

x- 5/3y=7
4/7x + y=-13/7

thanks, please show me steps

dnn