### Instruction: If $5a+2b=0$ and $a$ is two less than $b$, what is $7b$?### Response: I need to find the value of $b$ first, and then multiply it by $7$ to get $7b$.
Since $a$ is two less than $b$, I can write $a=b-2$ and substitute it into the first equation.
This gives me $5(b-2)+2b=0$, which I can simplify by expanding and collecting like terms.
I get $5b-10+2b=0$, or $7b=10$.