a: =>(x+3)=25-5*4=5
=>x=2
b: =>(x-9)=125-64-8=53
=>x=62
c: =>4(x-5)=16*3+8=56
=>x-5=14
=>x=19
d: =>5(x+7)=40+10=50
=>x+7=10
=>x=3
i: =>5(x+4)=110
=>x+4=22
=>x=18
j: =>x+5=81-64=17
=>x=12
g: =>9x=81+2*9=99
=>x=11
h: =>10x=100+20=120
=>x=12
f: =>5x=10+25=35
=>x=7