3 years ago

5(2x − 12) + 21 = 2x + 41 I know the answer is 10 but can someone explain how to get that?

Mathematics

2 answers:

inessss [21]3 years ago

7 0

X= 10.
use LCM to subtract fractions.
start with add/minus
then divide/times
then bracket

dsp733 years ago

6 0

$5(2x-12)+21=2x+41\\\\5\cdot2x-5\cdot12+21=2x+41\\\\10x-60+21=2x+41\\\\10x-39=2x+41\qquad|+39\\\\10x-39+39=2x+41+39\\\\10x=2x+80\qquad|-2x\\\\10x-2x=2x+80-2x\\\\8x=80\qquad|:8\\\\\boxed{x=10}$

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