Question

Y-165=620+173. 800-x=870-610 a:15=54:18. y-420=600-56 55•x=820-710 300-x=42•2

Answer 1

у-165=620+173

у-165=793

у=793+167

у=960

800-х=870-610

800-х=260

х=800-260

х=540

a:15=54:18

а:15=3

а=15•3

а=45

y-420=600-56

у-420=564

у=564+420

у=984

55•x=820-710

55•х=110

х=110:55

х=2

300-x=42•2

300-х=84

х=300-84

х=216

Answer 2

Let's solve each of these equations step by step:

1. Y - 165 = 620 + 173 First, add 165 to both sides of the equation: Y - 165 + 165 = 620 + 173 + 165 Y = 958

2. 800 - x = 870 - 610 First, subtract 870 - 610 to get the value on the right side of the equation: 800 - x = 260 Now, subtract 800 from both sides to isolate x: 800 - 800 - x = 260 - 800 -x = -540 Finally, divide both sides by -1 to solve for x: x = 540

3. a:15 = 54:18 To solve for 'a,' we can set up a proportion: a / 15 = 54 / 18 Now, cross-multiply: 18a = 54 * 15 18a = 810 Finally, divide both sides by 18 to solve for 'a': a = 810 / 18 a = 45

4. Y - 420 = 600 - 56 First, calculate the right side of the equation: Y - 420 = 600 - 56 Y - 420 = 544 Now, add 420 to both sides to isolate Y: Y - 420 + 420 = 544 + 420 Y = 964

5. 55 * x = 820 - 710 Calculate the right side of the equation: 55 * x = 820 - 710 55 * x = 110 Now, divide both sides by 55 to solve for x: (55 * x) / 55 = 110 / 55 x = 2

6. 300 - x = 42 * 2 First, simplify the right side of the equation: 300 - x = 84 Now, subtract 300 from both sides to isolate x: 300 - x - 300 = 84 - 300 -x = -216 Finally, divide both sides by -1 to solve for x: x = 216

So, the solutions to the equations are:

1. Y = 958
2. x = 540
3. a = 45
4. Y = 964
5. x = 2
6. x = 216