Solve:
7y+4y+2=−43
7y+4y+2=−43⇒3(7y+4)=−4(y+2) ⇒21y+12=−4y−8⇒21y+4y=−8−12 ⇒25y=−20⇒y=−2025 ⇒y=−45
Therefore, the solution of 7y+4y+2=−43 is y=−45.
Question 57 (e)
Add the following expression:
x3y2+x2y3+3y4 and x4+3x2y3+4y4
Question 58 (d)
Subtract:
x4+3x3y3+5y4 from 2x4−x3y3+7y4.
Question 69
Solve the following:
2y−34−3y−52=y+34