Question

Selesaikan soal berikut ini dengan cara yang menurut kamu mudah

a) 5x + 2y = 8
2x + 3y = 1

b) 3x - 2y = 8
6x + 5y = 7

c) 3x - y = 16
4x - 3y = 23

d) 4x - 3y - 10 = 0
2x - 5y + 2 = 0


tolong bantu jawab :)

Answer 1

A.) 5x = 8-2y
x = 8/5 - 2/5y

2(8/5 - 2/5y) + 3y = 1
16/5 -4/5y + 3y = 1
11/5y = 1-16/5
11/5y = -11/5
y = -1

2x-3 = 1
2x = 4
x = 2


b.) 6x-4y= 16
6x = 16+4y

16+4y+5y = 7
9y = -9
y = -1

6x-5 = 7
6x = 12
x = 2

c.) 9x-3y = 48
-3y = 48-9x

4x+48-9x = 23
-5x = -25
x = 5

20-3y = 23
-3y = 3
y = -1

d.) 4x-10y = -4
4x = 10y-4

10y-4-3y-10 = 0
7y = 14
y = 2

4x -6 - 10= 0
4x = 16
x = 4