Mathematics: Sam solved a similar equation below. is sams solution correct? explain why or why not? 9x+1=7(3x-2) 9x+1=21x-14 -30x+1 =-14 -30x=-15 x=1/2

Sam solved a similar equation below. is sams solution

Ответ:

david1236544

14.03.2022

The answer is incorrect.

9x+1=7(3x-2) (expand)
9x+1=21x-14 (subtract 21x from both sides)
-12x+1=-14 (subtract 1 from both sides)
-12x=-15 (Divide both sides by -12)
$x=\frac{-15}{-12}$ (Simplify)
$x= \frac{5}{4}$ (Answer)

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Ответ:

Poohpooh1510

03.01.2022

Mathematics

no solutions

Step-by-step explanation:

Given the 2 equations

y = 4x + 2 → (1)

y = 4x + 6 → (2)

Substitute y = 4x + 2 into (2)

4x + 2 = 4x + 6 ( subtract 2 from both sides )

4x = 4x + 4 ( subtract 4x from both sides )

0 = 4 ← not possible

This indicates the system has no solution

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Sam solved a similar equation below. is sams solution correct? explain why or why not? 9x+1=7(3x-2) 9x+1=21x-14 -30x+1 =-14 -30x=-15 x=1/2

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