Question

What is the solution to the equation?

7(5 + 9) = 7 • x + 7 • 9

A.
x = 1

B.
x = 5

C.
x = 7

D.
x = 9

Answer 1

The answer is B.


7(5+9)=7x+(7)(9)

Simplify both sides of the equation.
98=7x+63

Flip the equation.
7x+63=98

Subtract 63 from both sides.
7x+63−63=98−63
7x=35

Divide both sides by 7.
7x7=357

Answer: x=5

Answer 2

thx, can you help me with 2 more?

Answer 3

Sure, as long as it's on algebraic equations, I'll be happy to help you! ^-^

Answer 4

ok, here the other q.

Answer 5

I made the blank spot x if that's okay for your assignment.


Simplify 8×63 to 504
504=8x+8×3

Simplify 8×3 to 24
504=8x+24


Subtract 24 from both sides
504−24=8x

Simplify 504−24 to 480
480=8x

Divide both sides by 8
4808=x

Simplify 4808 to 60
60=x

Switch sides
x=60

Answer is 60.

Double checking:


Let x=60
8×63=8×60+8×3

Simplify 8×63 to 504
504=8×60+8×3

Simplify 8×60 to 480
504=480+8×3

Simplify 8×3 to 24
504=480+24

Simplify 480+24 to 504
504=504

Answer 6

whats the first blank?

Answer 7

The first blank was 60 but let me recalculate.

Answer 8

Last blank is 504

Answer 9

ok, here last q.

Answer 10

Is this a test?

Answer 11

no, beyond the lesson, i swear.

Answer 12

Hmm, okay.

Answer 13

Sorry I took so long. it is 12.2 and 44.0.

Answer 14

thx sooooooo much!

Answer 15

No problem! ^-^