3 years ago

What step is needed to solve this equation: -2 + x = 7?

Mathematics

2 answers:

guajiro [1.7K]3 years ago

7 0

Answer:

Step-by-step explanation:

Add 2 to both sides. Then you get x=9

svetoff [14.1K]3 years ago

5 0

Answer:

x=9

Step-by-step explanation:

-2+x=7

regroup

x-2=7

Add 2 to both sides

x=7+2

x=9

Hope This Helps.

You might be interested in

The top of a table is in the shape of a trapezoid. It has a height 1.5 feet and the two parallel bases measure 3 feet and 5 feet

Ksju [112]

Answer: 6 feet 2

Step-by-step explanation:

7 0

3 years ago

Simplify : x ^ (1/3) * (x ^ (1/2) + 2x ^ 2)

Rudiy27

Answer:

$x^{\frac{1}{3}}\:\times \left(x^{\frac{1}{2}}\:+\:2x^2\right)=x^{\frac{5}{6}}+2x^{\frac{7}{3}}$

Step-by-step explanation:

$x^{\frac{1}{3}}\:\times \left(x^{\frac{1}{2}}\:+\:2x^2\right)$

Let us simplify the expression

$x^{\frac{1}{3}}\:\times \left(x^{\frac{1}{2}}\:+\:2x^2\right)$

$\mathrm{Apply\:the\:distributive\:law}:\quad \:a\left(b+c\right)=ab+ac$

$a=x^{\frac{1}{3}},\:b=x^{\frac{1}{2}},\:c=2x^2$

$=x^{\frac{1}{3}}x^{\frac{1}{2}}+x^{\frac{1}{3}}\times \:2x^2$

$=x^{\frac{1}{3}}x^{\frac{1}{2}}+2x^2x^{\frac{1}{3}}$

$\mathrm{Apply\:exponent\:rule}:\quad \:a^b\cdot \:a^c=a^{b+c}$

so the expression becomes

$=x^{\frac{5}{6}}+2x^{\frac{7}{3}}$

Thus,

$x^{\frac{1}{3}}\:\times \left(x^{\frac{1}{2}}\:+\:2x^2\right)=x^{\frac{5}{6}}+2x^{\frac{7}{3}}$

5 0

3 years ago

Explain why the product is always less than one when you multiply a fraction by another fraction

Sveta_85 [38]

Because when you do that ...

-- you're starting with a piece that's less than ' 1 ', and

-- you're calculating a piece of it that's less than the whole original piece.

8 0

3 years ago

Read 2 more answers

Please help its timed

pav-90 [236]

the second option, domain means x-values

8 0

3 years ago

Read 2 more answers

Maggie wants to buy a new energyefficient refrigerator. Her old refrigerator uses about 1200 kWh per year,while the new one wou

romanna [79]

Answer:

800 Kwh

Step-by-step explanation:

5 0

3 years ago