10) Let x be the number of people of this family: The total paid with the parking is $51 The total paid WITHOUT the parking is $51-$6 = $45 They spent $3.5(x) for the entry, they also spent $5.5(x) for the pass: 3.5(x) + 5.5(x) = 45 9x = 45 and x = 5 people
11) Translate English to Math language: Let x be this number: 5.x - 18 - 4.x = -36
x - 18 = -36 Add 18 to both sides x - 18 + 18 = - 36 + 18 x = - 18
