Lynne bought 7 books about cats and 2 books about the solar system. She also bought 3 magazines. Each book cost 7$ and each magazine cost $4. How much did Lynne spend in all?
Lynne bought a total of 7 + 2 = <<7+2=9>>9 books
The books cost Lynne 9 x 7 = $<<9*7=63>>63
For 3 magazines, Lynne spent 3 x 4 = $<<3*4=12>>12
In total, Lynne spent 63 + 12 = <<63+12=75>>75$
#### 75