To simplify the expression (7m \cdot 6n - 5m \cdot 8n), first multiply the coefficients: (7 \cdot 6 = 42) and (5 \cdot 8 = 40). This gives us (42mn - 40mn). Now, combine like terms: (42mn - 40mn = 2mn). Thus, the simplified expression is (2mn).
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5m-12n
-5(7m + 9) -7m
n=10/7. i did this one mentally. but are you sure its 8n minus negative 4n or is it 8n minus 4n? 8n- -4n does not equal 8n-4n 8n- -4n is the same as 8n+4n
It is: -3+8n-5 = 8n-8 when simplified
3 + 8n = -58n = -8n = -1