ALJEBRA-7

Ikiwa 4a + 8 = 28; tafuta thamani ya a

Suluhu

4a + 8 = 28

4a + 8-8 = 28-8   toa 8 kila upande

4a + 0 = 20

4a = 20

4a = 20

4        4

a= 5

Kwa hiyo a = 5