en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

a+b=20,a-b=4

Solution

a + b = 20, a - b = 4

Solution

a = 12, b = 8

Solution steps

[a + b = 20 a - b = 4]

Isolate

a

for

a + b = 20 : a = 20 - b

Substitute

a = 20 - b

[20 - b - b = 4]

Simplify

[20 - 2 b = 4]

Isolate

b

for

20 - 2 b = 4 : b = 8

For

a = 20 - b

Substitute

b = 8

a = 20 - 8

Simplify

a = 12

The solutions to the system of equations are:

a = 12, b = 8

Popular Examples

b*a_{1}=20,iq=-2

b \cdot a_{1} = 20, i q = - 2

2 x + y = 8, y = - x + 5

2x-6y+8z=24,2x+y+3z=2,3x+y+2x=16

2 x - 6 y + 8 z = 24, 2 x + y + 3 z = 2, 3 x + y + 2 x = 16

3x+4y=10,4x-3y=5

3 x + 4 y = 10, 4 x - 3 y = 5

3x-5y=2,6x-10y=-40

3 x - 5 y = 2, 6 x - 10 y = - 40

Frequently Asked Questions (FAQ)

What is a+b=20,a-b=4 ?
The solution to a+b=20,a-b=4 is a=12,b=8