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Verified answer
1.5x + 2y = 15|× 2
3x + 4y = 23|× 1
10x + 4y = 30
3x + 4y = 23
__________—
7x = 7
x = 1
3x + 4y = 23
3 + 4y = 23
4y = 23 - 3
4y = 20
y = 5
2.
x + y = 3
x - y = 17
______+
2x = 20
x = 10
x + y = 3
10 + y = 3
y = 3 - 10
y = - 7
Maaf Kalau Salah