7x + y + 3 = y7x + 3 = 07x = -3x = -3/7
2x2 + 7x - 15 = 02x2 + 10x - 3x - 15 = 0(2x2 - 3x) + (10x - 15) = 0x(2x - 3) + 5(2x - 3) = 0(2x - 3)(x + 5) = 0(2x - 3) = 0 or (x + 5) = 0x = 3/2 or x = -5
7x + 4 = 2x + 5Subtract 4 from each side of the equation:7x = 2x + 1Subtract 2x from each side:5x = 1Divide each side by 5:x = 1/5 = 0.2
7x = 5+5x 7x-5x = 5 2x = 5 x = 2.5
x=6
x2 + 7x = 2x2 + 6 x2 - 2x2 + 7x = 6 -x2 +7x - 6 = 0 or alternatively x2 - 7x + 6 = 0
Minus 61 (-61)
x2+7x=-2x2+6 3x2+7x-6=0 (3x-2)(x+3)=0 3x-2=0 or x+3=0 x=2/3 or x=-3
(2x + 1)(x + 3) = 0; x = -0.5 or -3
2x2 + 7x = 0 => x(2x+7)=0 so x = 0 or 2x+7 = 0 ie x = 0 or x = -7/2
The answer is x=0
The factorisation is as follows: 2x2 + 7x - 9 = (x - 1)(2x + 9).
7x+17 = 45 7x = 45-17 7x = 28 x = 4
7x + 9 = 51 7x = 42 x = 42/7 = 6
Factors: (2x + 3)( x - 5) so x = -1.5 or 5
7x(3x3 - 2x2 + 5x + 1)
7x + y + 3 = y7x + 3 = 07x = -3x = -3/7