Question

70+(15-5)-80 8×6-64÷8 28+x=91 x-35=60

Answer 1

Ответ:

70+(15-5)-80=0

8×6-64÷8=40

28+х=91

х=91-28

х=63

x-35=60

х=60+35

х=95

Answer 2

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

1. 70 + (15 - 5) - 80: First, solve the inner parentheses: 15 - 5 = 10. Then, substitute the result back into the equation: 70 + 10 - 80. Now, perform addition and subtraction from left to right: 70 + 10 = 80, and 80 - 80 = 0. Therefore, the result is 0.

2. 8 × 6 - 64 ÷ 8: First, perform the division: 64 ÷ 8 = 8. Then, substitute the result back into the equation: 8 × 6 - 8. Next, perform the multiplication and subtraction from left to right: 8 × 6 = 48, and 48 - 8 = 40. Therefore, the result is 40.

3. 28 + x = 91: To isolate the variable x, we need to get rid of the 28 on the left side. Subtract 28 from both sides of the equation: 28 + x - 28 = 91 - 28. Simplify: x = 63. Therefore, the value of x is 63.

4. x - 35 = 60: To isolate the variable x, we need to get rid of the -35 on the left side. Add 35 to both sides of the equation: x - 35 + 35 = 60 + 35. Simplify: x = 95. Therefore, the value of x is 95.

Summary of results:

1. 70 + (15 - 5) - 80 = 0
2. 8 × 6 - 64 ÷ 8 = 40
3. 28 + x = 91, x = 63
4. x - 35 = 60, x = 95