5y+8=7y
subtract 5y from each side
, 5y+8=7y
-5y -5y
8=2y
/2 /2
4=y
-2
(-5, 2)
The Commutative Property of Addition.
x=(-5y-1)/3
If: 4x = 5y Then: x = 5y/4
2y+5y=10 7y=10 y=10/7
Y=5
-2
5y+8=7y 2y=8 y=4
Simultaneous Equations. 4x + 5y = 51 4x - 5y = 21 eliminate 'y' by addition. Hence 8x = 72 x = 72/8 x = 9 When x = 9 Substitute into eith equation. 4(9) + 5y = 51 36 + 5y = 51 5y = 51 - 36 5y = 15 y = 3 Hence the answer is ( x,y) = ( 9,3).
(-5, 2)
The Commutative Property of Addition.
45
x=(-5y-1)/3
If: 4x = 5y Then: x = 5y/4
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 + 7 = 25y = -5y = -1