The problem 4 x 315 can be solved by multiplying 4 by 315. The answer is one thousand, two hundred and sixty.
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If: 20x+5y = 15 Then: y = -4x+3
(4x + 5)(x - 3)
(4x2 - 13x - 12)/(4x+ 3) = (4x + 3)(x - 4)/(4x + 3) = (4x + 3)(x - 4)/(4x + 3) = x - 4 :)
(3x - 5)(x + 3)
5-4x=x-35-4x+4x=x-3+4x (adding 4x on both side)5=5x-35+3=5x-3+3 (adding 3 on both side)8=5xx=8/5