40 + X = 25
subtract 40 from each side
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Subtract 1 form both sides of the equation
subtract 19 from 91. this will give you 8X equals 72. then you divide 72 by 8, and therefore X will equal to 9
Combine the constants on one side. -4x = 36
3X + 2 + X - 6 = 25 gather like terms, 2 and -6 added together and X and 3X added together 4X - 4 = 25
add 2 to 22, then divide by 6. n= ? n= 4