Solve for X X/2+ 7=9 Show your steps and explain why you did them.

Mathematics

2 answers:

Sophie [7]3 years ago

7 0

Answer:

Step-by-step explanation:

Solve for X

by simplifying both sides of the equation, then isolating the variable.

X = 4 x 2 +7=9

Step 1: Simplify both sides of the equation.

1 2 x+7=9

Step 2: Subtract 7 from both sides.

1 2 x+7−7=9−7

1/2 x=2

Step 3: Multiply both sides by 2.

2*( 1 2 x)=(2)*(2)

x=4

Answer: 4

Gre4nikov [31]3 years ago

6 0

Answer:

X = 4

Step-by-step explanation:

X/2+ 7=9

X/2 = 9-7

X/2 = 2

X = 4

hope it helps!

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How do you solve d+12=2 using mental math

n200080 [17]

By minusing 12 to both sides
d+12=2
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5 0

3 years ago

Kate decides to replace all the lights in her college apartment with energy saving light bulbs beginning this month. The packagi

tatyana61 [14]

Answer:

Kate's electric bill will be $9 for this month for bulb use only.

Step-by-step explanation:

Given:

Electricity bill lass month from bulb use = $12

Using new bulbs percent decrease in electricity = 25%

We need to find this month electric bill for bulb use.

Solution:

First we will find the reduction in bill after using new bulbs.

reduction in bill after using new bulbs can be calculated by percent decrease in electricity using new bulb multiplied by last month Electricity bill from bulb use only.

framing in equation form we get;

reduction in bill after using new bulbs = $\frac{25}{100}\times 12 =\$3$

Now we will find this month electric bill for bulb use only.

this month electric bill for bulb use only can be calculated by subtracting reduction in bill after using new bulbs from last month electric bill for bulb use only.

framing in equation form we get;

this month electric bill for bulb use only = $\$12-\$3=\$9$