exam Maths Puzzle Numerical Ability

8-5(4-3x)=2(4-x)-8x

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exam Other Question

Find the solution by substitution:
4x+3y=5
2x-y=-5 Please help me solve this i have no idea what to do: determine the unknown coordinate so that the line containing the points has the given slope: (-3,y) and (2,-2) m= -1