Question

720:(90-х)+45=125 пж​

Answer 1

$720 : ( 90 - {x} ) + 45 = 125,\\720 : ( 90 - {x} ) = 125 - 45,\\720 : (90 - {x} ) = 80,\\90 - {x} = 720 : 80,\\90 - {x} = 9,\\{x} = 90-9\\{x} = 81$

Answer 2

To solve the equation, let's break it down step by step:

720 : (90 - x) + 45 = 125

First, let's simplify the expression inside the parentheses:

90 - x = 90 - x

Now, we can substitute this back into the equation:

720 : (90 - x) + 45 = 125

720 : (90 - x) = 125 - 45

720 : (90 - x) = 80

To get rid of the division, we can multiply both sides of the equation by (90 - x):

720 = 80 * (90 - x)

720 = 7200 - 80x

Rearrange the equation:

80x = 7200 - 720

80x = 6480

Divide both sides by 80:

x = 6480 / 80

x = 81

So, the value of x that satisfies the equation is x = 81.