Question 1011875
{{{system(P(x)=60000root(3,x-1970),P(x)=120000)}}}-->{{{60000root(3,x-1970)=120000}}}-->{{{root(3,x-1970)=120000/60000}}}-->{{{root(3,x-1970)=2}}}-->{{{x-1970=2^3}}}-->{{{x-1970=8}}}-->{{{x=1970+8}}}-->{{{highlight(x=1978)}}}