Ответ:
=5а+5б+9а+3б=14а+8б=14×3+8×2=42+16=58
=13а+13б-7б+4а=17а+6б=17×3+6×2=51+12=63
=6х+6а-5а=6х+1а=6×4+1×3=24+3=27
=30х-9х=21х=21×4=84
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Ответ:
=5а+5б+9а+3б=14а+8б=14×3+8×2=42+16=58
=13а+13б-7б+4а=17а+6б=17×3+6×2=51+12=63
=6х+6а-5а=6х+1а=6×4+1×3=24+3=27
=30х-9х=21х=21×4=84