Question

(4-5y+9)-(6,2-3,1y)=7,2+2,8

Answer 1

Решение на фото, фото прикрепила.надеюсь, что помогла.

Answer 2

To solve the equation, we need to combine like terms and isolate the variable on one side of the equation. Let's go step by step:

Given equation: (4 - 5y + 9) - (6,2 - 3,1y) = 7,2 + 2,8

Step 1: Simplify the expressions inside the parentheses: 4 - 5y + 9 = 13 - 5y 6,2 - 3,1y = 3,1 - 3,1y

Step 2: Rewrite the equation with the simplified expressions: (13 - 5y) - (3,1 - 3,1y) = 7,2 + 2,8

Step 3: Remove parentheses: 13 - 5y - 3,1 + 3,1y = 7,2 + 2,8

Step 4: Combine like terms on each side of the equation: (13 - 3,1) + (-5y + 3,1y) = 10 + 2,8

Step 5: Simplify further: 9,9 - 1,9y = 12,8

Step 6: Now, let's isolate the variable (y) on one side. To do that, we'll move 9,9 to the other side by subtracting it from both sides of the equation: 9,9 - 1,9y - 9,9 = 12,8 - 9,9

Step 7: Simplify: -1,9y = 2,9

Step 8: Finally, solve for y by dividing both sides by -1,9: y = 2,9 / -1,9

y ≈ -1.52631578947 (rounded to two decimal places)

So, the value of y that satisfies the equation is approximately -1.53.