its 10x +9y +1z
25X + 30 = 15X subtract 15X from each side 25X - 15X + 30 = 15X - 15X 10X + 30 = 0 subtract 30 from each side 10X + 30 - 30 = 0 - 30 10X = -30 divide both sides integers by 10 (10/10)X = - 30/10 X = - 3 ----------------check in original equation 25(- 3) + 30 = 15(- 3) - 75 + 30 = - 45 - 45 = - 45 ----------------checks
2x + 3 + 23x = 25x +3
25x + 35x + 9 is 60x + 9, which factors to 3(20x + 3)
25x + 75 = 25*(x + 3)
its 10x +9y +1z
25X + 30 = 15X subtract 15X from each side 25X - 15X + 30 = 15X - 15X 10X + 30 = 0 subtract 30 from each side 10X + 30 - 30 = 0 - 30 10X = -30 divide both sides integers by 10 (10/10)X = - 30/10 X = - 3 ----------------check in original equation 25(- 3) + 30 = 15(- 3) - 75 + 30 = - 45 - 45 = - 45 ----------------checks
32 + 25x + 18 = 50 + 25x
x = 2 and y =-3 so the lines intersect at (2, -3)
25x (square) plus 40 plus 15 equals 680.
2x + 3 + 23x = 25x +3
There is some kind of formula here, half angle, or some such that I forget, but I do remember the algorithm. So...,int[cos(10X)cos(15X)] dxsince this is multiplicative, switch it aroundint[cos(15X)cos(10X)] dxint[cos(15X - 10X)/2(15 -10) + cos(15X + 10X)/2(15 + 10)] dxint[cos(5X)/10 + cos(25X)/50] dx= 1/10sin(5X) + 1/50sin(25X) + C=========================
25x + 35x + 9 is 60x + 9, which factors to 3(20x + 3)
25x + 75 = 25*(x + 3)
The sum is 28x
25x-75y+25 = 25(x-3y+1)
25x = 11 so x = 0.44