Question

1)63 : х = 159-159 2)80 × у = 1000 - 280 3)7 × х = 84 :4

Answer 1

1)63:х=0

Нет решения

$2)80 \times y = 1000 - 280 \\ 80 \times y = 720 \\ y = 720 \div 80 \\ y = 9$

$3)7 \times x = 84 \div 4 \\ 7 \times x = 21 \\ x = 21 \div 7 \\ x = 3$

Answer 2

Let's solve the equations step by step:

1. 63 : x = 159 - 159

To solve for x, first perform the operation on the left side of the equation: 63 : x = 0

Now, the equation becomes: 0 = 159 - 159

Both sides are equal to 0. This means the equation is true for any value of x.

2. 80 × y = 1000 - 280

To solve for y, first perform the operation on the left side of the equation: 80 × y = 720

Now, the equation becomes: 720 = 1000 - 280

Next, subtract 1000 and -280 to find the value of y: 720 = 720

This equation is also true, which means y can be any value that satisfies the original equation.

3. 7 × x = 84 : 4

To solve for x, first perform the operation on the right side of the equation: 84 : 4 = 21

Now, the equation becomes: 7 × x = 21

To find the value of x, divide both sides by 7: x = 21 / 7 x = 3

So, the value of x that satisfies this equation is 3.