① 4.4x+6y=54 ② 2.9x+4y=35 ③ 17.3x+8y=51 { { {9x+2y=87 8x+3y=30 x+6y=27④22.x+6y=14 { 3x+3y=27⑥1.2x+9y=81 {3x+y=34 ⑦2.9x+4y=35 {8x+3y=30 ⑧3.7x+2y=52 {7x+4y=62 ⑨4.4x+6y=54 {9x+2y=87 5.2x+y=7{2x+5...