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Solve these simultaneous equations: 7x+3y=84, 2x+2y=32

Make x the subject of either equation:x = (32-2y)/2;x = 16-yRepresent an equation as a function of y only: 7(16-y)+3y = 84;112-7y+3y = 84;112-4y = 84;-4y = -28; y = 7Use the value of y to determine value of x:2x = 32 - 2y;x=9

Answered by Thomas P. • Maths tutor

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Solve these simultaneous equations: 7x+3y=84, 2x+2y=32

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