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alexgriva [62]
1 year ago
8

How do I solve explain steps

Mathematics
1 answer:
deff fn [24]1 year ago
5 0

Answer:

There's no real solutions to this expression.

Step-by-step explanation:

5x - (3 - 2x) = - (-x - 7) + 6x

  • First we need to get rid of the parenthesis and to do that we multiply inside the parenthesis with -1

5x - 3 + 2x = x + 6 + 6x (remember, negative × negative = positive)

  • Now add/subtract like terms:

5x + 2x - 3 = 7x - 3

x + 6x + 7 = 7x + 7

  • Rewrite the equation:

7x - 3 = 7x + 7, 7x will eliminate each other so we will be left with,

-3 = 7 which cannot be true so we say there's no real solutions to this expression.

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Read 2 more answers
Solve for m. 2= m/2 - 7 whats the answer?
xz_007 [3.2K]
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.
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