Упростите выражение 1) 3x+2+x+5 2) 4x-x+3+2
3х+2+х+5=(3х+х)+(2+5)=4х+7
4х-х+3+2=(4х-х)+(3+2)=3х+5
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3х+2+х+5=(3х+х)+(2+5)=4х+7
4х-х+3+2=(4х-х)+(3+2)=3х+5