Answer:
6 tricycles
Step-by-step explanation:
Since 1 bicycle have 2 wheels..
11 x 2 = 22 wheels
40 - 22 = 18 wheels (Total number of wheels the tricycles have)
A tricycle have 3 wheels..
18 ÷ 3 = 6 tricycles
-2(8a - 4b = 20)
5a - 8b = 62
-16a + 8b = -40
5a - 8b = 62
-11a= 22
a= -2
5(-2) - 8b = 62
-10-8b = 62
-8b =72
b = -9
Answer:
umm i dont really know, but you can try just doing it normally, and then figuring out the meaning of x and r
Step-by-step explanation:
Answer:
x = 10 4/5
Step-by-step explanation:
We want to find the value of x in the expression below;
2 1/4/x = 1 1/2/3 3/5
The best thing to do here is to turn all the mixed fractions to improper fractions. Thus, we have;
9/2/x = 3/2/18/5
= 9/2x = 3/2 * 5/18
9/2x = 15/36
9 * 36 = 15 * 2x
324 = 30x
x = 324/30 = 10 8/10 = 10 4/5
Step-by-step explanation:
Equation (1) is :
x+2=5
Subtract 2 from both sides,
x+2-2=5-2
x=3
Equation (2) is :
2n+5=n
Taking like terms together,
2n-n=-5
n=-5
Equation (3) is :
5(x+2)-7=3x+5
⇒5x+10-7=3x+5
taking like terms together,
5x-3x=5-10+7
⇒2x=2
x=1
Hence, x =3, n = -5 and x = 1 is the required answer.