The answer depends on what the percentage problem is. The equations will be different depending on whether you want to find:
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4 x .25 = 1
You do not need to write anything to calculate things mentally.
write and solve an equation to find the value of x. 8x plus 35 and then 14x-7
you have to write down the equation first so people can answer it
how can you specify what the variable stand for, write and equation, and solve this problem. a sewing project requires material costing $44 plus some tassels. if the material and tassels are to be purchased with four $20 bills, how many tassels can be purchased if they cost $2.40 each?