Question

Lengkapi pasangan terurut untuk tiap-tiap persamaan
A. y= -x+6;(9,.......)
B. y= 6x - 7;(2,.....)
C.2x-15y = 13; (........,-3/4)
D. -x + 12y = 7;(.......,3/4)

Answer 1

A. y = -x + 6 ; (9,-3)
y = -9 + 6
y = -3
b. y = 6x - 7 = (2,5)
y = 6.2 - 7
y = 12 - 7
y = 5
c. 2x - 15y = 13 ; (7/8,-3/4)
2x - 15.-3/4 = 13
2x + 45/4 = 13 ,maka 2x = 13 - 45/4 = 52/4 - 45/4 = 7/4
2x = 1/2,maka x = 7/4 × 1/2 = 7/8
d. -x + 12y = 7 ; (2,3/4)
-x + 12.3/4 = 7
-x + 9 = 7
-x = 7 - 9
-x = -2
x = 2