(1)
(2)15:3=12:x (3)
(4)
|
(1)
10x=6×7, 10x=42, 10x÷10=42÷10, x=4.2; (2)15:3=12:x, 15x=3×12, 15x=36, 15x÷15=36÷15, x=2.4; (3)
x=
(4)
0.25x=1.25×1.6, 0.25x=2, 0.25x÷0.25=2÷0.25, x=8. |
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(2)
=
(3)x:6=0.7:0.28(4)20:3=50:x
