4 years ago

3x -2=13 what is x ...........

Mathematics

2 answers:

mars1129 [50]4 years ago

7 0

$3x-2=13\\
3x=15\\
x=5$

Tom [10]4 years ago

3 0

Methods:

$3x-2=13$

=> $3x-2+2=13+2$

=> $3x+0=15$

=> $3x=15$

=> $\frac{3}{3}x= \frac{15}{3}$

=> $x = \frac{5}{1}$ or $5$

or, (do side changing)

$3x-2=13$

=> $3x=13+2$

=> $3x=15$

=> $x= \frac{15}{3}$

=> $x= \frac{5}{1}$ or $5$

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