What is neagtive four equal r over twenty minus five

r=-20

Step-by-step explanation:

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Step-by-step explanation:

r=20

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answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

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