substitution 2x – 3y + = -45, x + 6y = 45 July 21, 2021 by Thu Nguyệt substitution 2x – 3y + = -45, x + 6y = 45
Answer: y = 9 x = -9 Step-by-step explanation: 2x – 3y + = -45 x + 6y = 45, x = 45 – 6y substitute for x: 2(45 – 6y) – 3y = -45 90 – 12y – 3y = -45 combine like terms: 90 – 15y = -45 15y = 135 divide both sides of the equation by 15: y = 9 x = 45 – 6(9) = -9 Reply
Answer:
y = 9
x = -9
Step-by-step explanation:
2x – 3y + = -45
x + 6y = 45, x = 45 – 6y
substitute for x:
2(45 – 6y) – 3y = -45
90 – 12y – 3y = -45
combine like terms:
90 – 15y = -45
15y = 135
divide both sides of the equation by 15:
y = 9
x = 45 – 6(9) = -9