3 years ago

(2 x + 1):15=(x-1):7

Mathematics

2 answers:

vampirchik [111]3 years ago

7 0

Answer:

x=22

Step-by-step explanation:

They are put in ratio form so

$\frac{2x + 1}{15} = \frac{x - 1}{7}$

so crisscross them

7 (2x+1)=15 (x-1)

14x+7=15x-15(collect the like terms)

14x-15x=-15-7

-x=-22 (divide both sides by -1 to find x)

x=22

GalinKa [24]3 years ago

4 0

(2 x + 1):15=(x-1):7
7(2x+1)=15(x-1)
14x+7=15x-15
14x-15x=-15-7
-x=-22
x=22

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(2 x + 1):15=(x-1):7​

(2 x + 1):15=(x-1):7