18. सरल कीजिए: (-3)+ (-12) (-4)-3x (-3)
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Answer:
(-3)+(-12) (-4) -3×(-3)
-3-(+48)-3×(-3)
-3-(+48)-3×(-3)
-3-(-144)×(-3)
-3+144×-3
+141×-3
-423
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