"is now solved" is correct and usable in written English.
You can use it when you are describing a situation or problem that is now resolved. For example, "The mystery of the missing cat is now solved—it had been hiding in the attic all along!".
That problem, BMW declared, is now solved with its advanced BluePerformance diesel engines, which are also quiet, don't smoke and drink only in moderation.
This problem is now solved.
This problem is now solved by the replacement of the defective DDV of the small unit.
However, a modified version of the problem is now solved repetitively.
Though we had a short setback with Lori changing jobs and me being the sole breadwinner, that is now solved with her new job.
This puzzle is now solved, because intravenous bDBI is degraded in the serum into smaller peptides, including the blood-brain barrier-permeable bDBI-19 (2 kDa), which produces the bDBI-like enhancing-morphine effect (Fig. 2B and 2D).
"The world's problems are now solved … courtesy of we gays … and wee gays like me".
This is only a reflection of the excessive freedoms we have granted banks in the past; it does not mean that our problems are now solved.
Does anyone really believe the challenges facing the Metropolitan Opera are now solved after the recent settlement that resulted in far lower cost savings than had been demanded?
Environmental economists are now solving the question - how large, in its physical dimensions, should the economic system be in relation to the ecosystem that sustains it [4]?
Consolidation and the conversion to digital systems are now solving those problems, but it will still take some time before a business model can be built solely on charging for content.
