How do you subtract and add fractions

Mathematics

2 answers:

GaryK [48]3 years ago

8 0

To subtract you have to have a common denominator and to add just add across

devlian [24]3 years ago

5 0

Before you can add or subtract fractions with different denominators.you first have to find common denominators. subtract the numerators and reduce fraction.

Adding fractions make sure numbers are same add the numerators and put it over the denominator,simplify the fraction if needed

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3x+4[2x-3(x+1)-20x]=25x+100

sashaice [31]

Simplify:
3x + 4[2x -3x -3 -20x] = 25x +100
3x + 4(-21x -3) = 25x + 100
3x - 84x -12 = 25x + 100
-81x -12 = 25x + 100
Add 12 and Subtract 25x from each side
-106x = 112
X = -112/106
X = -56/53
^^^^^^^^^^
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Mr. Martin drove 290 miles last week This week he drove 125 miles more than last week. How many miles did Mr. Martin drive this

DanielleElmas [232]

Answer:

Mr. Martin drove 415 miles this week.

Step-by-step explanation:

The question says Mr. Martin drove 125 miles more than <u>last week</u>. How many miles did Mr. Martin drive this week?

How many miles did he drive last week?

Remember: 290 miles is the miles he drove last week.

The problem says he drove 125 miles AND 290 miles this week. So you take the SUM of them to see how many miles he drove together.

290 + 125 = 415

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xz_007 [3.2K]

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Answer:

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