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Aleonysh [2.5K]
3 years ago
12

What is the solution to this equation? 7x + 3 = 10x - 5.4

Mathematics
1 answer:
stich3 [128]3 years ago
7 0

Answer:

x=2.8

Step-by-step explanation:

7x+3=10x-5.4

Subtract 3 from both sides:

7x+3-3=10x-5.4-3

7x=10x-8.4

Subtract 10x from both sides:

7x-10x=10x-8.4-10x

-3x=-8.4

Divide both sides by -3:

\frac{-3x}{-3}=\frac{-8.4}{-3}

x=2.8

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A rectangular bedroom is 4 ft longer than it is wide. Its area is 140 ft2. What is the width of the room? ft
steposvetlana [31]

Answer: width = 10 ft

Step-by-step explanation:

Area = length × width

Let l be length and w be width

l = w + 4 ........equation (1)

From above formula

140 = l × w. ........equation (2)

Substitute equation (1) into equation (2)

140 = (w+4) × w

w^2 + 4w= 140

w^2 + 4w - 140= 0

By factorization method

(w+14)(w-10)= 0

w=-14 or w= 10

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Yoshi is riding in a bike a thon to raise money for his favorite charity. So far he's completed 1/10 of the bike a thon. How man
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Step-by-step explanation:

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P = 24*120

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