2×(y+5)-14=26
2×y+5-14=26
2×(у+5)=26+14
2×(y+5)=40
y+5=40÷2
y+5=20
y=20-5
y=15
__________
2×(15+5) -14=26
Отвeт: у=15.
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2×(y+5)-14=26
2×y+5-14=26
2×(у+5)=26+14
2×(y+5)=40
y+5=40÷2
y+5=20
y=20-5
y=15
__________
2×(15+5) -14=26
Отвeт: у=15.