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uranmaximum [27]
3 years ago
9

How many solutions does x + 2x + 7 = 3x - 7

Mathematics
1 answer:
Alex17521 [72]3 years ago
3 0

Answer:

No solutions! :)

Step-by-step explanation:

To find the number of solutions in a problem we must solve it.

x+2x+7=3x-7

Firstly, combine common terms:

3x+7=3x-7

We can subtract 3x from both sides:

7=-7

The solution is 7=-7, which is no solution.

When a number is equal to a number in a solution, it has no solutions!

:))

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\bf \begin{array}{lllll}
&x_1&y_1\\
%   (a,b)
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\end{array}
\\\\\\
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\\\\\\
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\\\\\\
y=\cfrac{7}{2}x-\cfrac{35}{2}+7\implies \stackrel{standard~form}{-\cfrac{7}{2}x+y=-\cfrac{21}{2}}
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