3/4x - 5y =7
x= -4y+12
i need solving the system of linear equations by substitution plz explain ! ( i clearly don't understand cause there will be 2 more questions like this ! )

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Your best friend told you that last week scientists disco y that las vegas is responsible for abrupt climate changes. which do you think is best way to research that recent discovery? an encyclopedia usgs internet site a book in the library your best friend’s parents for your ! ❤️

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?