Question

x + (x + 6) = (x + 8) + 21
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Answer 1

Step-by-step explanation:

$x + (x + 6) = (x + 8) + 21 \\ = 2x + 6= x + 29 \\ = 2x - x = 29 - 6 \\ = x = 23$

Answer 2

$+(+6)=(+8)+21$

$++6=(+8)+21$

$2+6=(+8)+21$

$2+6=+8+21$

$2+6=+29$

$2+6−6=+29−6$

$2=+23$

$2−=+23−$

$=23$