X = -2(13 + y) / 3x = 5y / 4 - 1
Presumably you want to know the value of y. 3y+2y+4+1 = 80 5y+5 = 80 5y = 80-5 5y = 75 y = 15
5y+8=7y 2y=8 y=4
4x + 5y = 2 and 7x - 2y = 1 From the first equation, x = (2 - 5y)/4 putting this value of x to the second equation, 7(2 - 5y)/4 - 2y =1 => (14 - 35y)/4 - 2y = 1 =>14 - 35y - 8y = 4 =>14 - 43y = 4 =>43y = 10 => y = 10/43 putting y = 10/43 in x = (2 - 5y)/4 => x =( 86 - 50 )/172 => x = 36/172 => x = 9/43 therefore, x = 9/43 and y = 10/43
If you mean: 80 = 3y+2y+4+1 then 80 =5y+5 and so y = 15
3y+2y+4+1=80 5y+5=80 5y=80-5 5y=75 y=15
(4, -1)
80 = 3y + 2y + 4 + 1 80 = 5y + 5 80 - 5 = 5y + 5 - 5 75 = 5y 75 / 5 = 5y / 5 15 = y
X = -2(13 + y) / 3x = 5y / 4 - 1
Presumably you want to know the value of y. 3y+2y+4+1 = 80 5y+5 = 80 5y = 80-5 5y = 75 y = 15
5y+8=7y 2y=8 y=4
80 = 3y + 2y + 4 + 1 75 = 5y 15 = y y = 15
x = 4 and y = -1 (4. -1)
Add 2y - 4 to each side; 5y - 13 = 0 so y = 2.6
5y = 2y - 123y = -12y = -4
7y + 4 = 5y - 6Subtract 4 from each side:7y = 5y - 10Subtract 5y from each side:2y = -10Divide each side by 2:y = -5
5y+8=7y subtract 5y from each side , 5y+8=7y -5y -5y 8=2y /2 /2 4=y