2y = 4x - 16 5y = 4x + 8 Subtract the first equation from the second: 3y = 24 so that y = 8 Substitute this into the first equation: 16 = 4x - 16 ie 32 = 4x so that x = 8 So the solution is (8, 8)
If the equation is -4x + 2 = 26, then you can solve like so: -4x + 2 = 26 -4x = 26 - 2 = 24 4x = -24 x = -6 Check: -6 * -4 = 24, 24 + 2 = 26
If: 4x+(-12) = 8 then 4x = 20 and x = 5
The inverse for f(x) = 4x + 8 isg(x) = x/4 - 2
x= 24x2 = 8
4x - 8 = 16 Add 8: 4x = 24 Divide by 4: x = 6
Let's represent the # with x 4x-8=8(x+2) 4x-8=8x+16 4x-8x=16+8 -4x=24 x=24/-4 x=-6 The number is -6
4x2+29x-24 = (4x-3)(x+8) when factored
8 - 2x + 6x = 24 collect (add) terms of x 8 + 4x = 24 subtract 8 from both sides 4x = 16 divide both sides by 4 x = 4
4x = 24 x = 24 ÷ 4 x = 6
8-3x-x = 12 8-4x = 12 -4x = 12-8 -4x = 4 x = -1
Let the length be x+4 and the width be x: Perimeter = 2(x+4+x) = 24 inches 2x+8+2x = 24 4x = 24-8 4x = 16 x = 4 Therefore: length = 8 inches and width = 4 inches Check: 8+8+4+4 = 24 inches
8-3x-x = 12 8-4x = 12 -4x = 12-8 -4x = 4 x = -1
-2x = -4x + 24 -2x + 4x = 24 2x = 24 x = 24/2 x = 12
Suppose the number is x. The sum of the number and two is x+2 Four times the sum is 4(x+2) The number times 8 is 8x 24 less than the number times 8 is 8x-24 4(x+2) = 8x-24 4x+8=8x-24 so 4x = 32 and x = 8
8 + 4x - x = 8 3x = 8 - 8 x = 0
If that's +4x, the answer is (x - 4)(x + 8) If that's -4x, the answer is (x + 4)(x - 8)