$\left \{ {{x-2y=2} \atop {3x+y=6\ |\cdot2}} \right. \\\\ \left \{ {{x-2y=2} \atop {6x+2y=12}} \right. \\+-----\\\\7x=14\ \ \ \ |:7\\x=2\\\\2-2y=2\\-2y=2-2\\-2y=0\\y=0\\\\ \left \{ {{y=0} \atop {x=2}} \right.$

7 0

3 years ago

Solve for x. x/7=-3 -21 -10 4 21

frez [133]

Answer:

D 21

Step-by-step explanation: x/7 = 3

isolate x by multiplyig both sides by 7: (7)(x/7) = (3)(7)

x = 21

5 0

3 years ago

WILL GIVE BRAINIEST IF CORRECT Which of the following doesn't belong? Explain.

Law Incorporation [45]

Step-by-step explanation:

a. 5x² - 80

b. 5(x² + 4x - 4x -16)

5(x² - 16)

5x² - 80

c. 5x² - 20x + 20x - 80

5x² - 80

d. 5x² - 11

D doesn't belong because 5x² - 11 is not the answer to A, B, or C.

4 0

3 years ago

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