Պարապունք 38

337,
ա) x + 8 = 33
x = 25
բ) 4x = 52
x = 13
գ) 7x + 12 = 26
x = 2
դ) 5*(x – 4) = 35
x= 11

338,
x + y = 18
y = x + 6
x + x + 6 = 18
2x = 12
x = 6
y = 12

339,
x + y = 22
y = x – 4
x + x – 4 = 22
2x = 26
x = 13
y = 9

340,
ա) 5x + x = 42
x = 7
բ) 3x + x = 28
x = 7
գ) 4x – x = 39
x = 13
դ) 7x – x = 54
x = 9

341,
ա)
x + y = 24
y = 3x
4x = 24
x = 6
y = 18

բ)
x + y = 63
y = 2x
3x = 63
x = 21
y = 42