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How do you solve the proportion #2/5=x/100#?
How do you simplify #6x*(1/x^-3)#?
How do you subtract #(12a ^ { 5} - 6a - 10a ^ { 3} ) - ( 10a - 2a ^ { 3} - 14a^4 )#?
How do you solve #8x + x = -70#?