Question

реши уравнения 15с+45-12=78 ,, (6у+14):2+15=40 ,, реши уравнения используя первое свойство равенств 16х+5=133,,42к-28к+180=600 реши уравнения используя второе свойство равенств 8у•5=56•5 ,,147а-49=(9+26)•7 пожалуйста решите очень надо

Answer 1

15с+45-12=78
15с+45=78+12
15с+45=90
15с= 90-45
15с=45
с=45:15
с=3
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15*3+45-12=78
78=78

(6у+14):2+15=40
(6у+14):2=40-15
(6у+14):2=25
6у+14=25*2
6у+14=50
6у=50-14
6у=36
у=36:6
у=6

Answer 2

Solving Equations Using Properties of Equality

Let's solve the given equations using the properties of equality.

1. Solving 15c + 45 - 12 = 78: - First, combine like terms: 15c + 33 = 78. - Then, subtract 33 from both sides: 15c = 45. - Finally, divide both sides by 15: c = 3. - Therefore, the solution is c = 3.

2. Solving (6y + 14) / 2 + 15 = 40: - First, subtract 15 from both sides: (6y + 14) / 2 = 25. - Then, multiply both sides by 2: 6y + 14 = 50. - Finally, subtract 14 from both sides: 6y = 36. - Therefore, the solution is y = 6.

3. Solving 16x + 5 = 133 using the first property of equality: - First, subtract 5 from both sides: 16x = 128. - Then, divide both sides by 16: x = 8. - Therefore, the solution is x = 8.

4. Solving 42k - 28k + 180 = 600 using the second property of equality: - First, combine like terms: 14k + 180 = 600. - Then, subtract 180 from both sides: 14k = 420. - Finally, divide both sides by 14: k = 30. - Therefore, the solution is k = 30.

5. Solving 8u • 5 = 56 • 5 using the second property of equality: - First, divide both sides by 5: 8u = 56. - Then, divide both sides by 8: u = 7. - Therefore, the solution is u = 7.

6. Solving 147a - 49 = (9 + 26) • 7: - First, simplify the right side: 147a - 49 = 35 • 7. - Then, calculate the right side: 147a - 49 = 245. - Finally, add 49 to both sides: 147a = 294. - Therefore, the solution is a = 2.

I hope these solutions are helpful! If you have any more questions or need further assistance, feel free to ask.