Question

А)9x+3,9=31,8б)(y+4,5):7=1,2РЕШЕНИЕ!!!!​

Answer 1

а)9x+3,9=31,8

9х=31,8-3,9

9х=27,9

х=3,1

б)(y+4,5):7=1,2

у+4,5=1,2×7

у+4,5=8,4

у=3,9

Answer 2

Ответ:9х=31.8-3.9

9х=27.9

Х=27.9/9

х=3.9

Пошаговое объяснение:

Answer 3

To solve the equations, let's find the values of variables 'x' and 'y' step-by-step:

А) 9x + 3.9 = 31.8

Step 1: Subtract 3.9 from both sides of the equation to isolate the term with 'x': 9x = 31.8 - 3.9 9x = 27.9

Step 2: Divide both sides by 9 to solve for 'x': x = 27.9 / 9 x = 3.1

So the value of 'x' is 3.1.

Б) (y + 4.5) / 7 = 1.2

Step 1: Multiply both sides by 7 to eliminate the fraction: y + 4.5 = 1.2 * 7 y + 4.5 = 8.4

Step 2: Subtract 4.5 from both sides to isolate the term with 'y': y = 8.4 - 4.5 y = 3.9

So the value of 'y' is 3.9.

The solutions to the equations are: А) x = 3.1 Б) y = 3.9