21 + 15 = 36
15+6 is 21. 13 + what is 21? 21 - 13 is 8 Eight
21 is the only solution of that equation.
2x - y = 15 2x + 3y = -21 As you observe both equations (having different slopes), you see that the system is consistent, and it has only one solution.
depends what 'a' =
73
x + 21 = 36Subtract 21 from each side:x = 15
24
10x+15 = 7x-21 10x-7x = -21-15 3x = -36 x = -12 Which is the solution to the above equation when simplified.
x = 15 as 4*15+6 = 66 3*15+21 = 66 or an easier way to do it 4x - 3x = 1x 21 - 6 = 15 1x = 15
122 !
no it equals 21 pints. 1 quart = 2 pints