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3 years ago

PLEASE HELP WILL GIVE BRAINLIEST AND 100 POINTS IF YOU EXPLAIN

Mathematics

2 answers:

GarryVolchara [31]3 years ago

4 0

1st eq. 4x +5y = 7

2nd eq. y = 3x+9

replace the value of y from 2nd eq for y in 1st eq.

4x +5(3x+9) = 7

now distribute:

4x + 15x + 45 = 7

combine like terms:

19x + 45 = 7

subtract 45 from each side:

19x = -38

divide both sides by 19

x = -38/19 = -2

now use value of x in 2nd eq to solve for y

y = 3(-2) +9 = -6 + 9 = 3

x = -2, y = 3

lesantik [10]3 years ago

3 0

2 answers will boost ur profile

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