*10*10
800-
539
------
261
______________________________________
4/9-1/x=(4x-9)/9x
--------------------------------------
А)x+4=75-15
x+4=60
x=60÷4
x=15
б)4x=75-15
4x=60
x=60÷4
x=15
<span>-954:66<span /><span /><span />1<span />5<span />9-<span />3<span />53<span />0 <span />-<span />5<span />4 <span />5<span />4 <span /><span /><span />0<span /><span /> 954 ÷ 6 = 159
</span><span>
</span>