Brainliest! If 2a+4b=5 and a is equal to three times b, what is 3a?

3a =

Step-by-step explanation:

Given

2a + 4b = 5 ← substitute a = 3b into the equation

2(3b) + 4b = 5

6b + 4b = 5

10b = 5 ( divide both sides by 10 )

b = =

Now

a = 3b = 3 × = , thus

3a = 3 × =

The value of 3a = 9/2

Step-by-step explanation:

Given the expression

Given that a is equal to three times b. so,

plug in a = 3b in the expression

Adding like terms: 6b+4b = 10b

Dividing both sides by 10

simplify

so

a = 3b ⇒ a = 3(1/2) = 3/2

Therefore, the value of 3a can be determined by substituting a = 3/2 in 3a.

3a = 3(3/2) = 9/2

Therefore, the value of 3a = 9/2

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation: