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Earn +20 ptsQ: What is -2y 7y 4?
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2y plus 3y-7y plus 4 equals 16?
2y+3y-7y+4=16 -2y=12y=-6Check it-12-18+42+4=16-30+46=1616=16
What is 5x-2y-5x plus 7y simplified?
5y explanaition 5x-5x=0, 0-2y=-2y, -2y+7y=5y
Solve 7y plus 4 equals 5y - 6?
7y + 4 = 5y - 6Subtract 4 from each side:7y = 5y - 10Subtract 5y from each side:2y = -10Divide each side by 2:y = -5
-4x plus 7y equals 9 2y equals -5x - 22?
(-4, -1)
X plus 7y equals 33 and 3x - 2y equals 7?
x + 7y = 33 (1) --> x = 33 - 7y (1a) 3x - 2y = 7 (2) To solve the simultaneous equations, starts by substituting the value for x found in (1a) into (2): 3(33 - 7y) - 2y = 7 99 - 21y - 2y = 7 -23y = -92 y = 4 Now substitute this value for y into (1a) and solve for x: x = 33 - 7(4) x = 33 - 28 x = 5 Therefore these equations have the solution x = 5, y = 4
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