Answer:
1 We set z=-4
(2*-4 + b)(-4 - 3) = 0
(-8 + b)(-7) = 0
Set the factor (-8 + b) equal to 0.
-8 + b = 0
Solving for b, we get 8
b = 8
2We simplify the equation to the form, which is simple to understand
6x-12=51-3x
We move all terms containing x to the left and all other terms to the right.
+6x+3x=+51+12
We simplify left and right side of the equation.
+9x=+63
We divide both sides of the equation by 9 to get x.
x=7
3 Move all terms containing x to the left, all other terms to the right.
Add '-8' to each side of the equation.
8 + -8 + 6x = 35 + -8
Combine like terms: 8 + -8 = 0
0 + 6x = 35 + -8
6x = 35 + -8
Combine like terms: 35 + -8 = 27
6x = 27
Divide each side by '6'.
x = 4.5
Simplifying
x = 4.5
4 Combine like terms: 6x + x = 7x
14 + 7x = 70
Solving
14 + 7x = 70
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-14' to each side of the equation.
14 + -14 + 7x = 70 + -14
Combine like terms: 14 + -14 = 0
0 + 7x = 70 + -14
7x = 70 + -14
Combine like terms: 70 + -14 = 56
7x = 56
Divide each side by '7'.
x = 8
Simplifying
x = 8
5 15-4=11+3=14
19-14= x=5
6Combine like terms: -2 + 10 = 8
8 + 6x + 8x = 8
Combine like terms: 6x + 8x = 14x
8 + 14x = 8
Add '-8' to each side of the equation.
8 + -8 + 14x = 8 + -8
Combine like terms: 8 + -8 = 0
0 + 14x = 8 + -8
14x = 8 + -8
Combine like terms: 8 + -8 = 0
14x = 0
Solving
14x = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '14'.
x = 0
Simplifying
x = 0
7idk sorry
8Solving
0.8 + 0.4x = 2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-0.8' to each side of the equation.
0.8 + -0.8 + 0.4x = 2 + -0.8
Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 0.4x = 2 + -0.8
0.4x = 2 + -0.8
Combine like terms: 2 + -0.8 = 1.2
0.4x = 1.2
Divide each side by '0.4'.
x = 3
Simplifying
x = 3
Explanation:
i hope this is right good luck