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2 years ago

—3x + 1/3y = 12 2y = 18х + 72 I need the answer ASAP how many solutions and the answer

Mathematics

1 answer:

erica [24]2 years ago

8 0

Answer:

Infinite solutions or all real numbers

Step-by-step explanation:

divide the bottom equation by 2 then....

-3x +1/3 (9x + 36) = 12

-3x + 3x + 12 = 12 (distribute the 1/3 to the terms in the parentheses)

12 = 12

Infinite solutions

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3 years ago

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14. Write a two-column proof.

scZoUnD [109]

Given:

$\bold{ 8x=4y-20} \\\\ \bold{ y=13}$

Prove:

$\bold{x=4}$

Solution:

$\to \bold{8x=4y-20}..........(i)\\\\\to \bold{ y=13}........................(ii)$

Putting the value of equation (ii) into the equation (i):

$\to \bold{8x=4(13)-20}\\\\\to \bold{8x=52-20}\\\\\to \bold{8x=32}\\\\\to \bold{x=\frac{32}{8}}\\\\\to \bold{x= 4}\\\\$

putting the value x into the equation (i):

$\to \bold{8(4)=4y-20}\\\\\to \bold{32=4y-20}\\\\\to \bold{32+20=4y}\\\\\to \bold{52=4y}\\\\\to \bold{y=\frac{54}{4}}\\\\\to \bold{ y= 13.5}$

Therefore, the value of x= 4

Learn more:

brainly.com/question/6219408

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2 years ago