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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
8n = 160 n = 20
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