tolong banget dibantu ya...PAKE CARA KERJA YANG JELAS OK!

1.2y = -x +5
y = mx + n => 2y = -x +5
y = -x +5
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2
ax+ by = c => 2y = -x +5
x +2y = 5
2.4x = y - 3
y = mx + n = >y = x -3
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4
ax + by =c => -y + 4x = -3
3. 5x = 2- 3y
y = mx +n => y= 2 - 5x
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3
ax + by =c => 5x + 3y = 2