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gayaneshka [121]
3 years ago
10

Solve this linear equation a+b=8 a-b=4

Mathematics
2 answers:
Studentka2010 [4]3 years ago
4 0

Answer:

a = 6 , b = 2

Step-by-step explanation:

a+b - (a-b) = 2b

8 - 4 = 4

2b = 4

b = 4 ÷ 2

b = 2

When b = 2,

a+2 = 8

a = 8 - 2

a = 6

mihalych1998 [28]3 years ago
3 0

Answer:

a = 12   b = -4

Step-by-step explanation:

To solve this equation it would be easiest to use the elimination method

a + b = 8

a - b = 4

a = 12

Now all we have to do is substitute 12 for a in any equation. For this I will use the first one.

12 + b = 8

Lastly subtract 12 from both sides

b = -4

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