420/100= 42x10/10x10=
42/10=
2x21/2x5=
21/5
(1/3)9^3 = (9/3)^3 = 3^3 = 27
21 is nearly 25% of 80, so my estimate is 25%
x+19= 26
x+19-19= 26-19
x= 7
Check answer by using substitution method
x+19= 26
7+19= 26
26= 26
Answer is x= 7 (D.)
Answer:
1/8 + 1/8 + 1/8
Step-by-step explanation:
