Respuesta :

choixongdong

Answer:

a = 15

Step-by-step explanation:

Plug in b = 3 into 5a-10b=45

5a-10(3) =45

5a - 30 = 45

5a = 75

a = 15

gmany

Answer:

a = 15

Step-by-step explanation:

[tex]\text{Put b = 3 to the equation}\ 5a-10b=45\ \text{and solve for}\ a:\\\\5a-10(3)=45\\5a-30=45\qquad\text{add 30 to both sides}\\5a=75\qquad\text{divide both sides by 5}\\a=15[/tex]

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