The sum of a number and seven is multiplied by four. The result is equal to negative twelve. The value of the number is __

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⟹Step-by-step explanation:

Lets Solve!

⟹The first thing we must do is define our variables. Lets look at the problem again:

"The sum of a number and 7 is multiplied by 4. The result is equal to -12."

We can make x the number that is being added to 7.

The sum of x and 7 is multiplied by 4. This expression equals -12.

⟹Now we use distribute 4 amongst (x+7)

Next we subtract 28 from both sides.

Last we divide 4 on both sides.

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Woohoo! Brainliest Appreciated! Hope I helped!

50 min

step-by-step explanation:

they will be decreasing both their times in half

60 / 2 = 30

40/2 = 20

30 + 20 = 50