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mina [271]
3 years ago
10

Solve 3x − x + 2 = 12. −5 4 7 5

Mathematics
2 answers:
jarptica [38.1K]3 years ago
8 0
Combine like terms:

3x - x = 2x
2x + 2 = 12

Subtract 2 from both sides:

2x = 10

Divide both sides by 2 to get x by itself:

x = 5

The value of x is 5.
Papessa [141]3 years ago
4 0
Judging by the question I noticed that I can simplify the equation 3x-x+2=12 by one step.
The outcome of simplification should be 2x+2=12.

Next you must subtract 2 from both sides to isolate the x. The new equation should be 2x = 10.

Lastly you must divide both sides by 2, the answer you should get is x=5, D.
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We have to solve this quadratic equation n^{2}+n=56 for n to get <em>which figure has 56 blocks</em>.

n^{2}+n=56\\n^{2}+n-56=0

For middle term factorization, we need <em>two numbers that multiplied gives us -56 and added gives us 1 (coefficient of n).</em>

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<u><em>"There is no negative figure number possible, so we disregard -8"</em></u>

Our answer is 7.


ANSWER: The 7th figure has 56 blocks.


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