Solve for x using
cross multiplication.
2x + 1
3
x + 2
2
x= [?]
Enter

Step 1

Make the right side of the equation a fraction:

3

x

2

+

2

x

−

1

x

2

−

1

=

−

2

1

Step 2

Cross multiply:

−

1

(

3

x

2

+

2

x

−

1

)

=

−

2

(

x

2

−

1

)

−

3

x

2

−

2

x

+

1

=

−

2

x

2

+

2

Step 3

Simplify:

−

2

x

+

1

=

−

2

x

2

+

3

x

2

+

2

−

2

x

+

1

=

x

2

+

2

−

2

x

=

x

2

+

1

0

=

x

2

+

2

x

+

1

Step 4

Solve for

x

:

0

=

x

2

+

2

x

+

1

We notice that the above represents the expanded form of the perfect square:

0

=

(

x

+

1

)

2

Because of the perfect square, we know that x has only one value:

x

=

−

1

d

step-by-step explanation:

cant open file sorry!

step-by-step explanation: