Question 637743
Given: -2.2-3(4+2.1a)=-1.9
Perform the multiplicative distribution yields
-2.2-12-6.3a=-1.9
Simplifying gives
-6.3a = 2.2+12-1.9
-6.3a = 12.3
Divide both sides by -6.3
(-6.3a)/(-6.3) = 12.3/(-6.3)
a = -12.3/6.3
a = -41/21
Check your answer
Is [-2.2-3(4+2.1*(-41/21))=-1.9]?
Is [-2.2-3(4-4.1))=-1.9]?
Is [-2.2-3*(-0.1)=-1.9]?
Is [-2.2+0.3=-1.9]?
Is [-1.9=-1.9]? Yes
Answer: a = -41/21