Respuesta :

JadeWatkins

Answer:

A = 3.4

Step-by-step explanation:

235 = 7(4 + 6a) - 3

you're trying to make both sides equal, that means whatever is happening on one side must happen on the other. to take minus 3 out of the equation you add 3 to both sides

235 + 3 = 7(4 + 6a) -3 + 3

238 = 7(4 + 6a)

next add within the parenthesis and multiply that by 7

238 = 7(4 + 6a)

238 = 7 × 10a

238 = 70a

next divide both sides by 70

238 ÷ 70 = 70a ÷ 70

3.4 = a

Answer: For #5, a = 5

Step-by-step explanation:

First, let's open the parenthesis.

235 = 7 (4 + 6a) - 3

235 = 28 + 42a - 3

Next, subtract 28 by 3 on the right side.

235 = 28 + 42a - 3

235 = 25 + 42a

Then, we'll subtract both sides by 25.

235 - 25 = 25 - 25 + 42a

210 = 42a

Finally, let's divide both sides by 42!

210 / 42 = 42a/42

5 = a

So, a = 5.

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