-3x+1+10x=x+4
1+7x=x+4
6x=3
x=.5
Answer:
A = 26
Step-by-step explanation:
sum of students = classA + classB + classC
let's say classA = A, classB = B, and classC = C
A + B + C = 66
class A has five more students than class B, so A = 5 more than B so A = 5+B
class C has 2 less students than class B, so C = 2 less than class B = B -2, so C = B-2
A + B + C = 66
A = 5+B
C = B-2
substitute 5+B for A and B-2 for C in the first equation to limit this to one variable (B)
(5+B) + B + (B-2) = 66
3B + 3 = 66
subtract 3 from both sides to isolate the variable and its coefficient
3B = 63
divide both sides by 3 to solve for B
B = 21
A = 5 + B = 5 + 21 = 26
Answer:
$855.65
Step-by-step explanation:
Multiply 785 by 0.09 to get the sales tax amount which is 70.65.
Add the sales tax amount to the price of the dining set to get cost after tax.
Answer:
Step-by-step explanation:
Put <em>n = 10</em> to the equation 
