exam Maths Puzzle Numerical Ability

Solve each system of equations by graphing each point. find the point of interception to determine solution or no solution.

Y = -3X + 5 (0, 5, 4)

Y = -3X + 5 (0, 5, 4)

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exam Other Question

i know how to do linear combination, but i cannot get the right answer for this problem:
2x+y+52=2y+50
2x+y+52=x-3y+131

I need help finding x and y.

Thank you! let s be the set of all real numbers except -1. define * on s by a*b=a+b+ab.
a)show that * gives a binary operation on s.
B)show that (s,*) is a group.
c) find the solution of the equation 2*x*3=7 in s.