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I need help on how to find out what x equals in this problem 2 1/7 + 3/7 (3x-5)= -4

Sagot :

We are given the following equation

[tex]2\frac{1}{7}+\frac{3}{7}(3x-5)=-4​[/tex]

Let us first convert the mixed number (2 1/7) to a simple fraction

[tex]2\frac{1}{7}=\frac{2\cdot7+1}{7}=\frac{14+1}{7}=\frac{15}{7}[/tex]

So the equation becomes

[tex]\frac{15}{7}+\frac{3}{7}(3x-5)=-4​[/tex]

Now multiply the fraction 3/7 by the terms in the bracket

[tex]\frac{15}{7}+\frac{9x}{7}-\frac{15}{7}=-4[/tex]

As you can see the fractions 15/7 cancels out.

[tex]\frac{9x}{7}=-4[/tex]

Finally, solving for x

[tex]\begin{gathered} \frac{9x}{7}=-4 \\ 9x=-4\cdot7 \\ 9x=-28 \\ x=-\frac{28}{9} \end{gathered}[/tex]

Therefore, the value of x is -28/9