If a room is paved with 4-decimeter-long blocks, 175 blocks are needed. If it is paved with 5-decimeter-long blocks, how many blocks are needed? (use equation solution)

If a room is paved with 4-decimeter-long blocks, 175 blocks are needed. If it is paved with 5-decimeter-long blocks, how many blocks are needed? (use equation solution)

Set X blocks
(5x5)x=4x4x175
25x=2800
x=112
A: 112 yuan