Having some trouble with a formula

[MathFunForTheWholeFamily]

I'm trying to get the distance to the center of mass from either the star or the planet.
m₁ is the mass of the star and m₂ is the mass of the planet. r₁ is the distance from the center of mass to the star and r₂ is the distance from the planet to the center of mass
m₁ = 1.9885×10³⁰
m₂ = 5.97237×10²⁴
r = 147,098,070
r = r₁ + r₂
m₁ x r₁ = m₂ x r₂
I know what m₁, m₂ and r are, but i need to know what r₁ and r₂ are.
Could someone help me?

 

[MathFunForTheWholeFamily]

Figured it out

 

[HallsofIvy]

Very good! For those who are still wondering, we have two equations for \(\displaystyle r_1\) and \(\displaystyle r_2\):
\(\displaystyle r_1+ r_2= 147,098,070= 1.4709807×10^8\) and
\(\displaystyle 1.9885×10^{30}r_1= 5.97237×10^{24}\).

From the first equation, \(\displaystyle r_2= 1.47098070×10^8- r_1\) so we can write the second equation
\(\displaystyle 1.9885×10^{30}r_1= 5.97237×10^{24}(1.7098070×10^8- r_1)= 1.02116×10^{32}- 5.97237×10^{24}r_1\).

I would write that as \(\displaystyle ar_1= b- cr_1\) with \(\displaystyle a= 1.9885×10^{30}\), \(\displaystyle b= 1.02116×10^{32}\), and \(\displaystyle c= 5.97237×10^{24}\) then solve for \(\displaystyle r_1= \frac{b}{a+ c}\).