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42x
It is: 42x+30x^2
7x = 42 Divide both sides by '7'. Hence x = 42/7 x = 6 The answer!!!!!
It means negative 42 times a certain number. x is a variable, you have to find x. Ex. if x is 1 then it would be -42 Multiplied by 1, which is -42.
why don`t you try a calculator buy one if you don`t have one.