Question

253 - (x – 459) = 138;502 - (217 - x) = 421;871 - (x + 157) = 385.​

Answer 1

Ответ:

Пошаговое объяснение:

1)253 - (x – 459) = 138;

253-х+459=138

-х=138-253-459

-х= -574

х= 574

2)502 - (217 - x) = 421

502-217+х=421

х=421-502+217

х=136

3)871 - (x + 157) = 385

871-х-157=385

-х=385-871+157

-х= -329

х= 329

Answer 2

1)х=574

2)х=136

3)х=329

Answer 3

It seems like you've provided three equations with variables, and it looks like you want to solve for the variable "x" in each equation. Let's solve them one by one:

1. $253 - (x – 459) = 138$

   First, distribute the negative sign through the parentheses:

   $253 - x + 459 = 138$

   Combine like terms:

   $712 - x = 138$

   Now, isolate "x" by subtracting 712 from both sides:

   $-x = -574$

   Finally, multiply both sides by -1 to solve for "x":

   $x = 574$

2. $502 - (217 - x) = 421$

   Again, distribute the negative sign:

   $502 - 217 + x = 421$

   Combine like terms:

   $285 + x = 421$

   Subtract 285 from both sides:

   $x = 136$

3. $871 - (x + 157) = 385$

   Distribute the negative sign:

   $871 - x - 157 = 385$

   Combine like terms:

   $714 - x = 385$

   Subtract 714 from both sides:

   $-x = -329$

   Multiply both sides by -1:

   $x = 329$

So, the solutions for the equations are:

1. $x = 574$
2. $x = 136$
3. $x = 329$