Sometimes, always, or never true? : 14x+3x-7=7x+7-4x

275/20 simplified (lmbo it told me to add more characters)

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.

How do you solving the solution of each system using elimination?