Question

Bantu dong,
Terimakasih

Answer 1

Verified answer

A)
-2x = 6
x = -3

3y = 9
y = 3

b)
x + y = 10
y - x = 4
*jumlahkan kedua persamaan*
2y = 14
y = 7
*substitusi ke persamaan pertama*
x + y = 10
x + 7 = 10
x = 3

c)
x - 4 = 2
x = 6

2 - y = 1
y = 1

d)
2x - 1 = 3
2x = 4
x = 2

2 - 3y = -1
-3y = -3
y = 1