a) 2(a+b)=98
a+b=49
3х+4х=a+b значит 3х+4х=49
х=7
3*7=21
4*7=28
б) 180-64=116
116=11х+6
110=11х
10=х
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a) 2(a+b)=98
a+b=49
3х+4х=a+b значит 3х+4х=49
х=7
3*7=21
4*7=28
б) 180-64=116
116=11х+6
110=11х
10=х