Cari nilai a+b jika a Dan b memenuhi 2a-b=11 2a+b=1​

Jawaban:

2a – b = 11

2a + b = 1

————– +

4a = 12

a = 12/4

a = 3

cari nilai b

2a – b = 11

2.3 – b = 11

6 – b = 11

-b = 11 – 6

-b = 5

b = -5

maka nilai a + b adalah

a + b

= 3 + (-5)

= -2