3 years ago

Solve x/2 - 3 = 7 A. 5 B. 10 C. 20 D. 40

Mathematics

2 answers:

12345 [234]3 years ago

4 0

Answer:

The answer is C.

Step-by-step explanation:

Add 3 to both sides and you will get x/2=10. Multiply by the reciprocal on both sides making x=20.

lakkis [162]3 years ago

3 0

The answer is C. Add three to both sides, and you get 10 replacing 7. 10 is now x, and divide

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jeka57 [31]

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2 years ago

Y = 3x + 15 3x + 3y = 9

Zina [86]

Answer:

$\Large\boxed{x=-3}$ $\Large\boxed{y=6}$

Step-by-step explanation:

Given the system of equations

$1)~y=3x+15$

$2)~3x+3y=9$

Divide 3 on both sides of the 2) equation

$3x+3y=9$

$3x\div3+3y\div3=9\div3$

$x+y=3$

Current system

$1)~y=3x+15$

$2)~x+y=3$

Substitute 1) equation into the 2) equation

$x+(3x+15)=3$

Combine like terms

$x+3x+15=3$

$4x+15=3$

Subtract 15 on both sides

$4x+15-15=3-15$

$4x=-12$

Divide 4 on both sides

$4x\div4=-12\div4$

$\Large\boxed{x=-3}$

Substitute the x value into one of the equations to find the y value

$y=3x+15$

$y=3(-3)+15$

$y=-9+15$

$\Large\boxed{y=6}$

Hope this helps!! :)

Please let me know if you have any questions

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1 year ago

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Mice21 [21]

Check the picture below.

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2 years ago

Alana and two of her friends evenly split the cost of a meal. each person owes $14.68.

True [87]

Answer:

$44.04

Step-by-step explanation:

14.68 * 3 = 44.04

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3 years ago