Answer:
6a + 13
Step-by-step explanation:
Given
2a + 4(a + 5) - 7 ← distribute parenthesis
= 2a + 4a + 20 - 7 ← collect like terms
= 6a + 13
Answer: 6a + 13
Step-by-step explanation: here you go: 2a + 4*(a+5) - 7
first we simplify the brackets (distributive property, you multiply 4 "a" times plus 5 times): 2a + 4a + 20 - 7
then you add those that multiply the variable separately from those that don't: 6a + 13