$\underline{+\left\{\begin{array}{ccc}x+2y=7\\x-2y=-1\end{array}\right}\qquad\text{add both sides of the equations}\\\\.\qquad\qquad2x=6\qquad\text{divide both sides by 2}\\.\qquad\qquad \boxed{x=3}\\\\\text{Put the value of x to the first equation}\\\\3+2y=7\qquad\text{subtract 3 from both sides}\\\\2y=4\qquad\text{divide both sides by 2}\\\\\boxed{y=2}\\\\Answer:\ \boxed{x=3\ and\ y=2\to(3,\ 2)}$

7 0

3 years ago

How to solve this?? (-4)-(-8)+(-4)

kirill115 [55]

(-4) - (- 8) + (- 4)
- 4 - (- 8) + (- 4)
- 4 + 8 + (- 4 )
- 4 + 8 - 4
= 0

6 0

2 years ago

Read 2 more answers

Write four decimals with the 4 digit in a different place in each --- ones tenths hundreds and thousandths.Then write a statemen

vodka [1.7K]

4 .04 .004 .0004
and no statment for me

4 0

4 years ago