Answer:
Inverse property of addition
Step-by-step explanation:
When you add two opposite numbers (4/5 is the opposite of [-4/5]) the answer is always zero.
Linear equations are all solved the same way. Figure out the operations performed on the variable. Undo those in reverse order.
Here, the variable is
- divided by 2
- has -7 added.
In reverse order, we undo these operations by
- adding 7
- multiplying by 2.
Whatever we do to one side of an equation, we must also do to the other side. That is how the equal sign remains valid.
2 = m/2 -7
2 +7 = m/2 -7 +7 . . . . . add 7
9 = m/2 . . . . . . . . . . . . simplify
2*9 = 2*m/2 . . . . . . . . multiply by 2
18 = m . . . . . . . . . . . . . simplify. (You know that 2/2 = 1, and m*1 = m.)
The answer is m = 18.
_____
Check:
.. 2 = 18/2 -7
.. 2 = 9 -7 . . . . . . . true. The answer checks OK.
Answer:
<em>There is no y value so I think you mean to solve for x</em>
<em>Here's how we do it!: </em>
<em>1/2(x-12) = 4</em>
<em>Add 12...</em>
<em>1/2(x) = 4</em>
<em>Divide by 1/2...</em>
<em>x = 8!</em>
<em>x equals 8 in this case</em>
Answer:
the first one 8za also plz give heart
Step-by-step explanation:
i just know
Answer:
3696527.04545
Step-by-step explanation:
