Answer:
x is 6
look at the ratio of 2.1 to 21
2.1 is multiplied by 10 to get 21 and therefore since these fractions are equal, x would have to be 6 in order for the equation to work
Step-by-step explanation:
5r + 2
9r-5r+2+r=5r+2
\mathrm{Group\:like\:terms}
=9r-5r+r+2
\mathrm{Add\:similar\:elements:}\:9r-5r+r=5r
=5r+2
16 and 1/3
2 × 6 = 12
12 ÷ 2 = 6
2 × 14 = 28
10 × 20 = 200
6 + 28 + 200 = 234
