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kvasek [131]
3 years ago
7

2x + 3 = -x + 12 Solve the equation, explanation is good.

Mathematics
1 answer:
raketka [301]3 years ago
7 0

Answer:

3

Step-by-step explanation:

2x + 3 = -x + 12

subtract 3 from both sides

2x = - x + 9

add x to both sides

3x = 9

divide by 3

x = 3

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Kenya is solving the equation 5 3/4 - 1/6x = 4 1/2. She gets to 1 1/4 = 1/6x. Is this a valid way to solve the equation? answer
Alona [7]

Answer:

15/2

Step-by-step explanation:

5 3/4 - 1/6x = 4 1/2

move the variable to it's own side.

5 3/4 - 4 1/2 = 1/6x

change the subtracting side to have common denominators

5 3/4 - 4 2/4 = 1/6x

1 1/4 = 1/6 x

divide both sides by 1/6, same thing as multiplying both sides by 6 (reciprocal)

30/4 = x

reduce: 15/2 = x

8 0
3 years ago
Abel saved 43 more nickels than dimes. After he spent 17 dimes he had twice as many nickels than dimes. How many coins did he ha
Alborosie

Answer:

180 coins

Explanation:

N = number of nickels (no nickels spent)

D = number of dimes initially saved

D' = number of dimes left after spending

1) N = D + 43

2) D' = D - 17

3) N = 2*D' = 2*(D - 17)

Set equations 1) and 3) equal to each other and solve for D:

D + 43 = 2*(D - 17)

D + 43 = 2*D - 34

D = 43 + 34 = 77

N = D + 43 = 77 + 43 = 120 nickels left

D' = D - 17 = 77 - 17 = 60 dimes left

Total coins left = 120 + 60 = 180 coins (I hope this is not too confusing for you)

8 0
2 years ago
Help mee plzz :))tyy
Dimas [21]

Step-by-step explanation:

Given prism has:

Length = 5 in, width = 4 in & height = 6 in

Surface area of prism

2(lw + wh + lh) \\  = 2(5 \times 4 + 4 \times 6 + 5 \times 6) \\  = 2(20 + 24 + 30) \\  = 2 \times 74 \\  = 148 \:  {in}^{2}  \\

4 0
3 years ago
Which expression is equivalent to 3.3.3.3
nikdorinn [45]

Answer:

I'm not sure but i think it's 34y

Step-by-step explanation:

7 0
2 years ago
Will put you the brainiest if answered first!!!!
Nastasia [14]

Answer:

i don't now sslslslslsl

Step-by-step explanation:

b gvff f f fhevfhevfb efbehjfbej fef ehfbekfj

4 0
3 years ago
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