Question

10x+7=3x-21 find the value of x. please help me friends​

Answer 1

$10x + 7 = 3x - 21 \\ 21 + 7 = 3x - 10x \\ 28 = 7x \\ x = \frac{-28}{7} \\ x = -4$

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Answer 2

Step-by-step explanation:

10x+7 = 3x -21

10x-3x = -21-7

7 x = -28

x = -28/7

= -4

hope it helps...