Question

A+b=240 a=b+65 надо решать

Answer 1

А+б=240
б+65+б=240
2б+65=240
2б=240-65
2б=175
б=175:2
б=87.5
Ответ:87.5

Answer 2

To solve this problem, we need to use the second equation to substitute the value of a in the first equation:

a = b + 65

Substituting into the first equation:

a + b = 240 (b + 65) + b = 240

Simplifying the equation:

2b + 65 = 240

Subtracting 65 from both sides:

2b = 175

Dividing both sides by 2:

b = 87.5

Now that we know the value of b, we can use the second equation to find the value of a:

a = b + 65 = 87.5 + 65 = 152.5

Therefore, the solution to the system of equations is:

a = 152.5 b = 87.5