Question

Math people plz answer the following ill give brainlest!!!
solve 1/3 x =12

solve 3x + 3 =21

solve 3/2 x -4 =16

9.95 + 0.30s
the variable s stands for the number of songs downloaded. find the cost of downloading 35 songs.

write an equation and solve to find the solution to the following problem.
you have 27$ to spend at the mall and a coupon for 6$ off at your favorite store. a t-shirt costs 11$. how many t-shirts can you buy using your coupon and the money??

Answer 1

Step-by-step explanation:

(1)

1 x = 12

3

multiply both sides by the 3

3 × 1 x = 12 × 3

3

x = 36

(2)

3x + 3 = 21

( group like terms)

3x = 21 - 3

3x = 18

( divide both sides by 3)

3x = 18

3 3

x = 6

(3)

9.95 + 0.30( 35 )

=9.95 + 10.5

=20.45

(4)

Answer 2

1) multiply by the reciprocal (the opposite) x=36
2) subtract 3 from both sides, divide by 3 on both sides, x=6
3) add 4 to both sides, multiply by reciprocal, x=40/3
4) plug 35 in for s, solve. $20.45 for 35 songs
5) 27 is your total, your constant is -6, your coupon, x=the number of shirts you can buy at $11 a shirt. Your equation is 11x-6=27
Add 6 to both sides, divide by 11, x=3. You can buy 3 shirts