6r + 7 = 13 + 7r
6r + 7 - 7r = 13
6r - 7r = 13 - 7
-r = 6
r = -6
13 - 14x = 1 - x
13 = 1 - x + 14x
13 - 1 = -x + 14x
12 = 13x
x = 12/13
2(x+7) + x = -20
2x + 14 + x = -20
2x + x = -20 - 14
3x = -34
x = -34/3
-8 - x = x - 4x
-8 = x - 4x + x
-8 = -2x
x = 4
Answer:Step-by-step explanation:
c。4.3
ddddddddddddddddddddddddddddddd

Let us take the width of the paper as base, the cut she made be hypotenuse and the paper's length be perpendicular.
Here,
Hypotenuse (H) = 87 inch
Base (B) = 60 inch
Perpendicular (P) = [To be calculated]
As, we can use Pythagoras theorem to find. So by using Pythagoras theorem :
H² = P² + B²

The length of the paper is 63 inches.

The equation should look like this: (28*31)+7= 875
Unless i've completely misunderstood the basis of the equation.