420×(-4)-4×420+(-420)×(-7)
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Step-by-step explanation:
= 420×(-4)-4×420+(-420)×(-7)
= {420 x(-4)}+{420 x (-4)}+{420 x 7}
= 420 {-4-4+7}
= 420 (-1)
= -420
Answer = -420
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might be like this l think,
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