X-12=13+12 +12x=2525
13 ? 15
-7+x=13x the -7=12x and x =-7/12
Because 3 x 4 = 12
x2+ 2x = 12 (complete the square) x^2 + 2x + 1 = 12 + 1 (x + 1)^2 = 13 (square root of both sides) x + 1 = ±√13 (subtract 1 to both sides) x = ±√13 - 1 x = √13 - 1 or x = -√13 - 1 x= 2.6 or -4.6
X-12=13+12 +12x=2525
-13
13 ? 15
12 x 13 = 156
26.
-7+x=13x the -7=12x and x =-7/12
-5x + 13 = -12 -5x = -12 - 13 = -25 x = -25/-5 = 5
-13 Plug 5 in and multiply it by -5 which equals -25 12 - 25 = -13
Because 3 x 4 = 12
3x - 12 = 10x - 15 - 6x -10 3x - 12 = 4x -25 3x + 13 = 4x 13 = 4x - 3x 13 = x None?
-11+x = 13-x TAKE x FROM BOTH SIDES -11 = 13-2x TAKE 13 FROM BOTH SIDES -24 = -2x DIVIDE BY TWO ON BOTH SIDES -12 = -x x = 12
2x + 1 = 13; 2x = 12; x = 6