PLEASE HELP WILL GIVE BRAINLIEST AND 100 POINTS IF YOU EXPLAIN
2 answers:
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
2 answers will boost ur profile
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