5x = 4x + 9 x = 9
4x + 6 = 6x - 12-4x -4x6 = 2x - 12+12 +1218 = 2xx=9
C and D
x2+11x+11 = 7x+9 x2+11x-7x+11-9 = 0 x2+4x+2 = 0 The above quadratic equation can be solved by using the quadratic equation formula and it will have two solutions.
The inverse of an equation is rewriting it as a function of the other variable. Simply solve the equation for x instead of y. y=9x can be written as x= (1/9)y --> fy=y/9◄ y=4x+6 (or 4x+6=y) -> 4x=y-6 -> x=(y-6)/4 --> gy=(y-6)/4■
4x+9=25 4x=16 x=4
4x + 9 = 254x = 25 - 94 x = 16x= 16/4x= 4
Subtract 4x from each side: 4x + 9 = 25Subtract 9 from each side: 4x = 16Divide each side by 4: x = 4
The answer to the problem of 13 equals -4x plus 9 is x equals -1.
5x = 4x + 9 x = 9
4x+5 = -9 4x = -9-5 4x = -14 x = -3.5
-4x + 3y = 9
4x
-5x + x + 9 = -4x + 12 -4x + 9 = -4x + 12 9 = 12 This equation has no solution.
3y = 4x + 9 -4x + 3y = 9 is the standard form
3+6x = 4x+9 6x-4x = 9-3 2x = 6 x = 3
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