book Maths Puzzle Numerical Ability

x=3y-1
x+2y=9

How do I solve the sytem of equation using the subsitution method? Please show the work!

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book Other Question

What is the y-intercept of the line with the equation 4x + 2y=12? Please help me? {{{y=(1/2)x+1}}} the distance of the point (3,0)?