7
5y-2y= 3y+2 5y-2y-3y= 2 0y= 2
10x - 5y + 2x - 3y = 12x - 8y
2x - 2y = 12 (1)1x + 5y = 34 (2)x + 5y = 34 subtract 5y to both sidesx = 34 - 5y (3)Substitute 34 - 5y for x into the first equation2x - 2y = 122(34 - 5y) - 2y = 1268 - 10y - 2y = 1268 - 12y = 12 subtract 68 to both sides-12y = -56 divide by -12 to both sidesy = 4.666666667Substitute 4.7 for y into the third equationx = 34 - 5yx = 34 - 5(4.7)x = 34 - 23.33333333x = 10.66666667Check:
6 - y + 5y - 6y = 6 - 2y
7
5y-2y= 3y+2 5y-2y-3y= 2 0y= 2
5y = 2y+9 5y-2y = 9 3y = 9 y = 3
3x+5y+8x+2y combine 3x and 8x to get 11x 11x+5y+2y combine 5y and 2y 11x+7y is the answer.
5y-6 = 29-2y 5y+2y = 29+6 7y = 35 y = 5
5y explanaition 5x-5x=0, 0-2y=-2y, -2y+7y=5y
Solving for y: 5y = 9 + 2y 5y - 2y = 9 3y = 9 y = 9/3 = 3
2y^2+5y+2=(2y+1)(y+2)
I understand this to be 4x + 3y - 5x + 2y. -x + 5y
5y + (4 - 2y) = 9 5y + 4 - 2y = 9 3y + 4 = 9 3y = 5 y = 5/3
3y-8+5y = 2y-39 3y+5y-2y = -39+8 6y = -31 y = -31/6
5y-7 = 2y+11 (+7 to both sides) 5y = 2y+18 (- 2y from both sides) 3y = 18 (divide both sides by 3 ) y = 6 y=6