Ta có 8,75 x X + 1,25 x X = 20
⇒(8,75+1,25)×X=20
⇒10×X=20
⇒X=20÷10
⇒X=2
Vậy X=2
\(8.75\times x+1.25\times x=20\)
\(x\times\left(8.75+1.25\right)=20\)
\(10\times x=20\)
\(x=20:10=2\)
8,75 * x + 1,25 * x = 20
⇔ x * ( 8,75 + 1,25 ) = 20
⇔ x * 10 = 20
⇔ x = 20 : 10
⇔ x = 2
8,75 x X + 1,25 x X = 20
(8,75 + 1,25) × X=20
10 × X =20
X = 20÷10
X =2
8,75 * x + 1,25 * x = 20
x*(8,75+1,25)=20
x* 10 =20
x = 20:10
x =2