12a ×b ×3a =
Answer =

Simplifying

12a + b + 3a + 5b = 0

Reorder the terms:

12a + 3a + b + 5b = 0

Combine like terms: 12a + 3a = 15a

15a + b + 5b = 0

Combine like terms: b + 5b = 6b

15a + 6b = 0

Solving

15a + 6b = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-6b' to each side of the equation.

15a + 6b + -6b = 0 + -6b

Combine like terms: 6b + -6b = 0

15a + 0 = 0 + -6b

15a = 0 + -6b

Remove the zero:

15a = -6b

Divide each side by '15'.

a = -0.4b

Simplifying

a = -0.4b

Step-by-step explanation:

answer: procent 54 wynosi 33,33%

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm