Question

90-60:х=87; 80:х+4=8

Answer 1

90-60:20=87
80:20+4=8

Answer 2

90-60:х=87
60:х=90-87
60:х=3
х=60:3=20
ответ:х=20
80:х+4=8
80:х=8-4=4
х=80:4
х=20
ответ:х=20

Answer 3

To solve the equations:

1. 90 - 60x = 87

First, we need to isolate the variable x on one side of the equation. We can do this by subtracting 90 from both sides and then dividing by -60:

90 - 60x = 87

-60x = 87 - 90

-60x = -3

x = (-3)/(-60)

x = 1/20

Therefore, the solution to the first equation is x = 1/20.

2. 80/x + 4 = 8

We can solve for x by first subtracting 4 from both sides:

80/x = 4

Then, we can isolate x by multiplying both sides by x:

80 = 4x

Finally, we can solve for x by dividing both sides by 4:

x = 80/4

x = 20

Therefore, the solution to the second equation is x = 20.

So, the solutions to the two equations are x = 1/20 and x = 20, respectively.