The original expression is equal to 0 because anything multiplied by 0 is equal to 0. Solve inside the brackets for the possible answer choices to find what will equal 0.
Start with the first expression. Add 4 and negative 4 will become 0, and -1 times 0 is equal to 0. Let's solve for the others just to be sure.
In the second expression, solving inside the brackets gives you 8. -1 times 8 is equal to -8.
Adding 4 and negative 4 in the third expression leaves you with 0. But, 1 + 0 is equal to 1.
Adding negative 4 and negative 4 gives you the answer of -8, and -1 times -8 is equal to 8.
Your answer is the first expression, or A.
If it’s not graded does it really matter but it’s 4042 I think
Simplifying
6y + 1 = 21y + 13
Reorder the terms:
1 + 6y = 21y + 13
<span>Reorder the terms:
1 + 6y = 13 + 21y
</span><span>Solving
1 + 6y = 13 + 21y
</span><span>Solving for variable 'y'.
</span><span>Move all terms containing y to the left, all other terms to the right.
</span><span>Add '-21y' to each side of the equation.
1 + 6y + -21y = 13 + 21y + -21y
</span><span>Combine like terms: 6y + -21y = -15y
1 + -15y = 13 + 21y + -21y
</span><span>Combine like terms: 21y + -21y = 0
1 + -15y = 13 + 0
1 + -15y = 13
</span><span>Add '-1' to each side of the equation.
1 + -1 + -15y = 13 + -1
</span>Combine like terms: 1 + -1 = 0
0 + -15y = 13 + -1
-15y = 13 + -1
Combine like terms: 13 + -1 = 12
-15y = 12
Divide each side by '-15'.
y = -0.8
<span>Simplifying
y = -0.8</span>
