exam Maths Puzzle Numerical Ability

Find the value of x in the equation 5x+20=4x+30

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exam Other Question

3y+20=3+2y

3(y+6)=30

-5y-9=-(y-1)

37-18+8w=67 please help me graph the following x^2+y^=1 and 9x^2+9y^2=64