题目五年级数学(方程)习题汇编及答案(1) 5x+4x=234 (2) 8.7+3x=16.8 (3) 12x=192(4) x÷35=0.2 (5) 4x-21=99 (6) 8x-1.2=10.8(7) 5.4x+0.2x+1.1=90.7 (8) 48x=9.6 (9) 8(0.2x-1.1)=21.6(10) 5(x+6)=55 (11) 5x÷25=2 (12) 7.2+2.9x=15....