Question

Tolong jawab pake cara nmr 21 #butuh banget

Answer 1

• (-1) + (4) = (2) + 2c
• 3 = 2 +2c
• 2c = 3-2
• 2c = 1
• c = 1/2

• (-b) + (-3) = (-4) + (c)
• -b = -4 +3 +c
• -b = -1 + c
• b = 1-c
• b = 1 - 1/2
• b = 1/2

• (3) + (b) = (3) + (a+1)
• 3 + 1/2 = 3 +a +1
• 3 -3 +1/2 -1 = a
• a = 1/2 -1
• a = (1/2 - 2/2)
• a = -1/2