A + 9 = 21 A = 21 - 9 A = 12
(3x - 7)(2x + 9) = 0 x = 7/3 or -9/2
2*2+4x-9=0 4x=9-4 4x=5 x=5/4
2x + 1 = 9 2x = 9 - 1 2x = 8 2x/2 = 8/2 x=4
9x = 60x = 60/9 = 6 2/3 (or 6.67)
To solve for 2 unknown variables you need 2 independent equations. You have only 1.
3
10
A + 9 = 21 A = 21 - 9 A = 12
4x+9 = 7x+3 4x-7x = 3-9 -3x = -6 x = 2
k equals 5.6
The equation does not have a solution.
(3x - 7)(2x + 9) = 0 x = 7/3 or -9/2
2*2+4x-9=0 4x=9-4 4x=5 x=5/4
2x + 1 = 9 2x = 9 - 1 2x = 8 2x/2 = 8/2 x=4
16x+9 without the rest of the equation, what this equals, I can't solve
9x = 60x = 60/9 = 6 2/3 (or 6.67)