Question

640-х=100*3 y+350=108+500 а:4=450-425 b-280=80:3

Answer 1

640 - х = 100 х 3
640 - х = 300
х = 640 - 300
х = 340

у + 350 = 108 + 500
у + 350 = 608
у = 608 - 350
у = 258

а : 4 = 450 - 425
а : 4 = 25
а = 25 х 4
а = 100

в - 280 = 80 : 3 (может быть не 80, а 90?)
в - 280 = 26,67
в = 280 +26,67
в = 306,67

в - 280 = 90 : 3
в - 280 = 30
в = 280 + 30
в = 310

Answer 2

Let's solve each equation one by one:

1. 640-х=100*3

First, we can simplify the right side of the equation by multiplying 100 and 3:

640 - x = 300

Then we can isolate x by subtracting 640 from both sides of the equation:

640 - x - 640 = 300 - 640

-x = -340

Finally, we can solve for x by dividing both sides of the equation by -1:

x = 340

Therefore, the solution for the first equation is x = 340.

2. y+350=108+500

We can simplify this equation by combining like terms on both sides:

y + 350 = 608

Then we can isolate y by subtracting 350 from both sides:

y + 350 - 350 = 608 - 350

y = 258

Therefore, the solution for the second equation is y = 258.

3. а:4=450-425

We can simplify this equation by subtracting 425 from 450:

a/4 = 25

Then we can solve for a by multiplying both sides of the equation by 4:

4(a/4) = 4(25)

a = 100

Therefore, the solution for the third equation is a = 100.

4. b-280=80:3

We can simplify this equation by multiplying 80 and 3:

b - 280 = 240

Then we can isolate b by adding 280 to both sides:

b - 280 + 280 = 240 + 280

b = 520

Therefore, the solution for the fourth equation is b = 520.

In summary, the solutions for the given system of equations are:

x = 340 y = 258 a = 100 b = 520